Propeller inspections are fairly clear cut damage on the blades is typically quite apparent, and the existence of damage beyond field repair limits dictates that the unit is disassembled and given a searching internal inspection, and in some cases, complete overhaul. Unfortunately, disassembly and nondestructive testing procedures are the only way to provide a reasonable level of assurance that the engine is truly fit for continued service. The actions are required to be accomplished in accordance with the service bulletin described previously. developer tools pages. But what is a prop strike and what exactly are the ramifications? dont do it. documents in the last year, 37 establishing the XML-based Federal Register as an ACFR-sanctioned (b) After the effective date of this AD, do not install a crankshaft with a SN that is Start Printed Page 70656listed in MSB 00-5C, dated October 10, 2000, unless core samples have been taken and TCM has approved it for return to service. CONTINENTAL TSIO-520-J $18,995 FOR SALE Engine with Accessories TSMO=488.2 No Prop Strike Photos, logs, details per request. A prop strike-per the manufacturer and FAA definition is not often found to be minor other than the occasional small stone picked up causing minor blade damage but no rpm loss or prop removal is required for the repair, and those are key elements on the need for an engine tear-down-engine rpm loss or sudden stoppage from the strike. Factory New & Factory Rebuilt Gasoline Engines +1.251.436.8101 08:00 - 17:00 Gasoline Engine Overhauls & MRO +1.251.990.5080 08:00 - 17:00 Technical Support (AvGas & If you need someone to remove and reinstall the engine, that's another $1,800. Teledyne Continental Motors has a slightly different approach, but not much different in practice. That said, we did an article a few years ago where an owner of an old Bonanza bought an IO-520 engine from another Bonanza engine owner who upgraded to a factory IO-550. Compliance with the requirements of this AD is required within the next 10 hours time-in-service from the effective date of this AD, unless already done. How much liability insurance do you have? Lycoming's new SB seems to generalize the term propeller strike and sudden stoppage to be quite inclusive. 01/17/2023, 823 The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a A special note to experimental aircraft builders or someone looking for an engine upgrade: Beware of that great deal on an engine with a less than stellar or unknown history. Steve Whitson, AOPA 593652, of Perris, California, has more than 3,000 hours and owns a 1977 Cessna 210. Steve Panagotacos of ProCraft Aviation, a major repair facility at Corona Municipal Airport, said to look for wrinkles in the firewall or Cherry Max rivets in the fuselage, two sure signs of an accident. Over the years, Continental has built a service offering for aircraft operators and owners These services include engine overhauls at the Continental factory service center for Continental, Titan, and LYCOMING engines, factory overhauls for Continental AvGas engines, sudden stoppage/propeller strikes, shock inspections, fleet overhaul programs, Jet-A burning engine Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" (iii) Maintain a record of each core sample obtained with each rotobroach bit used. Lycoming is particularly concerned with this area and outlines specific inspection criteria with the force of AD 2004-10-14 to support their bulletin SB 475C depending on engine model. In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to Federal Register. This year's numbers have placed us in the top 10, highlighting another strong year of property development. Use the PDF linked in the document sidebar for the official electronic format. Operators shall submit their requests through an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Atlanta ACO. Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Atlanta Aircraft Certification Office (ACO). Our designation as a Cessna Service Center and authorization as a parts and engine distributor for both Lycoming and Continental 01/17/2023, 284 This amendment is prompted by reports of crankshaft failures, and by the addition of additional crankshaft serial numbers (SN) that have been added to the suspect population. on documents in the last year, 117 The President of the United States issues other types of documents, including but not limited to; memoranda, notices, determinations, letters, messages, and orders. This Airworthiness Directive (AD) is applicable to Teledyne Continental Motors (TCM) IO-360, TSIO-360, LTSIO-360, O-470, IO-470, TSIO-470, IO-520, TSIO-520, LTSIO-520, IO-550, TSIO-550 and TSIOL-550 series reciprocating engines that were assembled, rebuilt, or overhauled using a crankshaft that was manufactured between April 1, 1998, and March 31, 2000, listed by engine and crankshaft serial number (SN) in TCM Mandatory Service Bulletin (MSB) 00-5C, dated October 10, 2000. Lycoming's Service Bulletin 475B requires that in the event that the engine has experienced a propeller strike, inspection and possible rework of the accessory gear train as well as the rear of the engine's crankshaft is required. Includes: Fuel Injection Spyder Starter Alternator Bendix Magnetos Gamijectors I will be more than happy to ship this engine to you. Note 10: 2400 hours TBO may apply. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. This feature is not available for this document. It is recommended that the technician views and understands Instructional Video for Compliance with Teledyne Continental Motors Mandatory Service Bulletin MSB 00-5C before performing these procedures. Also, some engines with a gear-driven alternator have a large, relatively thin and very vulnerable gear bolted to the forward end of the crankshaft. documents in the last year, by the Veterans Affairs Department The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. 2 Blade Continental O-200/Lycoming O-235 Ground Adjustable STOL Propeller $ 74CK $ 76AK-2 $ FIND A DEALER NEAR YOU. documents in the last year, by the Federal Communications Commission If you can imagine a loose rod banging around inside your engine, you know it's bad. The engine SN can be found in logbooks or other maintenance records. In fact, the customers were sold their own crank. All communications received on or before the closing date for comments will be considered, and this rule may be amended in light of the comments received. Prop strike. These two words are guaranteed to make any pilot wince. Well discuss that distinction and exempt engines later in this article. Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Code of Federal Regulations (14 CFR part 39) as follows: 1. A prop that hits so hard as to bend the crank flange is only one of several considerations. Refer McCauley Service Bulletin 137W. The concern, of course, is the prospect of hidden damage, which can cause, and has caused, subsequent engine failures. Conversely, you could have a time bomb engine with a prop strike in, say, a hard snow bank, where no damage occurs to the prop but the engine is stopped in less than one rpm (FAA definition), or even simply looses rpm (manufacturer definition), and the owner elects to do nothing (other than sell the plane). Any incident while the engine is operating in which the propeller makes contact with any object that results in a loss of engine RPM, such as propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. Contact TCM to obtain additional rotobroach bits. PROPELLER STRIKE INSPECTIONS. Document Drafting Handbook On TCM engines with the geared alternators up front, he has seen the mounting flange and the gear drive bolts break during a prop strike. The authority citation for part 39 continues to read as follows: Authority: TCM SB 96-11B defines a propeller strike as follows, and we paraphrase: First, any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades, for instance where the propeller is damaged by a small foreign object during operation, such as a small stone. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. The one that came with the airplane had passed TBO (time between overhauls) but its logbooks didn't go back to when it came from the factory. Although not a guarantee of any kind, the lack of movement showed that utter destruction had not occurred. Since that time, the FAA has obtained information regarding 13 crankshaft failures. Panagotacos recently paid $66 for the list of a 1956 Cessna 182, which is in his shop. Type of operator/engine makes a difference (f) This amendment becomes effective on December 12, 2000. The thought of the damage and cost involved makes all of us shudder. Never allow an insurance adjuster to dictate the inspection requirements after an incident. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. We know of no ADs on TCM engines in this area to muddy the waters, so its the owners decision unless they are operating other than under Part 91, such as Part 135 where compliance with service directives is typically mandatory. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. This can cause major internal engine damage without visible prop damage. Schwaner made the point that more than a few people have been told their engine's crank is bad, but it just so happens that the shop has the one you need in stock. Be especially wary if this is some form of private cash sale that has to be done right away, unless you are planning to have it torn down and rebuilt by a shop with the right inspection equipment to inspect for crank and gear damage, and be prepared for costs potentially exceeding a factory reman engine i.e. documents in the last year, 90 what would martial law in russia mean phoebe arnstein wedding joey michelle knight son picture brown surname jamaica. More than the prop and crankshaft Everyone was happy and the prices were right. Ken Tunnel of Lycon Aircraft Engines in Visalia, California, an engine facility used by a number of owners of show airplanes, said, "There's no way you can tell if there's any damage regardless of the circumstances. documents in the last year, 84 corresponding official PDF file on govinfo.gov. Textron Lycoming must take the position that in the case of a sudden stoppage, propeller/rotor strike or loss of propeller/ rotor blade or tip, the safest procedure is to remove and disassemble the engine and completely inspect the reciprocating and rotating parts including crankshaft gear and dowel parts. Since an unsafe condition has been identified that is likely to exist or develop on other engines of this same type design, this airworthiness directive (AD) requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. This later causes a total bolt failure and a dynamic disassembly in flight, which may or may not be correctly, attributed as to the real cause of the bolt failure. However, they have the caveat that the inspecting mechanic may override that position and return the engine to service without disassembly and inspection if he feels that it is the prudent and responsible thing to do. DeJoris says he is dealing with claims adjusters on a regular basis, and many adjusters today choose to have you go the extra mile and tear down the entire engine and propeller and do a thorough inspection." PROP STRIKE. 106(g), 40113, 44701. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. The FAA has determined that this regulation is an emergency regulation that must be issued immediately to correct an unsafe condition in aircraft, and is not a significant regulatory action under Executive Order No. Phone: (813) 752-3711 He continues, "T.C.M. And as we previously mentioned, the Lycoming 475C bulletin is broader than a prop strike; it is oriented to general engine overhaul crank inspections or crankshaft gear removal for inspection as well as prop strikes. This is not restricted to propeller strikes againstthe ground. Thread starterkevmor99. The service information referenced in this AD may be obtained from Teledyne Continental Motors, PO Box 90, Mobile, AL 36601; telephone toll free 1-888-200-7565, or on the TCM internet site www.tcmlink.com. This information may be examined at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC. Got a nick on your prop? DeJoris explains, "Take for example the prop governor drive the rotating mass in the prop governor, mainly the flyweight assembly can really be problem if suddenly stopped. So, when it comes time for that prop strike/sudden. +1.251.436.8122 08:00 - 17:00 Gasoline Engines Parts +1.972.586.1000 24 hours Avionics +1.251.990.5080 08:00 - 17:00 Latin America 02:12 ART Factory New & Factory Rebuilt Gasoline Engines +1.251.436.8101 10:00 - 19:00 Gasoline Engine Overhauls & MRO +55.11.99923.9579 08:00 - 17:00 Technical Support (AvGas & Jet-A) +1.888.826.5465 09:00 - And what's a "solid object?" Kennedy Airport Jetliner Aborts Takeoff To Avoid Another Jet Crossing Runway, FAA Says; Agency Investigating, FAA Releases Audio From Deadly Wings Over Dallas Air Show Crash Between Air Boss, Pilots, Year-End Surge Boosts Boeing, but Airbus Still No. the material on FederalRegister.gov is accurately displayed, consistent with The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. Continental Properties has earned a spot on the National Multifamily Housing Council's (NMHC) list of the Top 10 developers in the country. To comply with AD 2004-10-14, if it applies to your engine, the engine does not need to be completely disassembled and access to the accessory gear train can be accomplished, in most cases, with the engine still installed in the aircraft. Unfortunately, it may be the next owner who discovers any hidden damage. A propeller strike is: (1) any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades as set forth in Part 1, B of My investigation started with my need for another engine for my Cessna 210. It also does not equivocate to any degree on an engine tear down being the mandatory procedure, which is described in the bulletin. These tools are designed to help you understand the official document What looks like light damage may sometimes result in something broken or highly stressed inside, while a major collision shows nothing wrong after it's been torn down." 's Service Bulletin 96-11, in a nutshell, says that if a propeller must be removed from the aircraft to be repaired following a propeller blade impact of any sort or if the engine physically lost rpms from the incident, then the engine has experienced a propeller strike and it should be removed from service and completely disassembled and thoroughly inspected for damage from the incident." Second, any time foreign object damage requires propeller removal for repairs other than the minor dressing of the blades as mentioned above, the incident is considered a propeller strike and must be inspected as outlined in SB 96-11B. Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the rule. A. documents in the last year, 1401 The following was overheard recently at a maintenance facility after a very irritable looking pilot walked in with a look of embarrassment on his face. Its also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. (iv) Do not exceed the torque limits specified in TCM MSB 00-5C, dated October 10, 2000, when obtaining the core sample. Another thing to look for in the logs is a prolonged period of inactivity, such as years between annual inspections and oil changes. Aircraft was involved in a prop strike. When a prop strike incident occured, standard industry accesptance was to have the mechanic remove the propeller and dial indicator, "or check the crankshaft flange for being out of limits." provide legal notice to the public or judicial notice to the courts. (ii) You may use each rotobroach bit to obtain up to six core samples. Communications should identify the Rules Docket number and be submitted Start Printed Page 70655in triplicate to the address specified under the caption ADDRESSES. Both Lycoming and Continental express concerns about prop-strikes causing damage to the rear of the crank in the vicinity of the rear radius of the oil slinger, which can be shoved back into the case rear. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. the most are "prop strike." You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. How much more time before overhaul is remaining on the engine? Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. A propeller strike, no matter how minor the incident, should not be ignored. Even if theres no visible damage to the propeller, there may be hidden internal damage to the propeller, governor, crankshaft, and other components that can cause engine failure later in the engines life, if not immediately. This damage can result in catastrophic engine failure. Dealing with them on this issue is fodder for another article, however. Basically anything that moves is subject to visual and other forms of nondestructive testing. My group also argued about the propeller hitting grass and water. For more than three decades, customers have trusted their airplanes to Triad Aviation, Inc. He used a football analogy of a player who can be brutally tackled and get right up, then trip over a bucket and break his leg. The FAA has reviewed and approved the technical contents of TCM Mandatory Service Bulletin (MSB) 005C, dated October 10, 2000. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. In fact it is a very insidious situation since there is often no obvious damage-no harm, no foul so to speak. Textron Lycoming must take the position that in the case of a sudden engine stoppage, propeller/rotor strike or loss of propeller/rotor blade or tip, the safest procedure is to remove and disassemble the engine and completely inspect the reciprocating and rotating parts including crankshaft gear and dowel parts. One, "A sudden rpm drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred." Should he also have performed the obligatory engine inspections? Still others will only pay for the labor to do the job and will not pay for any parts. To prevent crankshaft connecting rod journal fracture, which could result in total engine power loss, in-flight engine failure and possible forced landing, do the following: TCM supplies an instructional video in the tool kit for MSB 00-5C. on NARA's archives.gov. All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. This prototype edition of the Besides the engine, some other areas that might suffer damage from a prop strike are the magneto drive shafts or the TCM starter drive adapters. FAA# JL4R288M | EASA.145.4115 | Toll Free: 800-282-3202 | 954-970-3200 Does 500 rpm fit that bill? The opinions differ with each individual, and what maintenance technicians would do personally is quite often at odds with their professional opinions. For engines that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? rendition of the daily Federal Register on FederalRegister.gov does not As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? [FR Doc. Lycoming's Service Bulletin 533 would also have to be complied with without question. The $8,500 differential is not insignificant. Also, on prop strikes involving frontal impact, the crank can be pushed back into the engine, cracking the case at the slinger ring, and this may not be visible. documents in the last year, 1487 The service information referenced in this AD may be obtained from Teledyne Continental Motors, PO Box 90, Mobile, AL 36601; telephone toll free 1-888-200-7565, or on regulatory information on FederalRegister.gov with the objective of That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. The crankshaft SN is only used to determine the need for taking a core sample for those crankshafts identified in paragraph (a) and (b) of this AD. Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. Moreover, the crank is not the only critical element in a prop-strike incident. We get e-mail from readers who have had what they often prefer to call prop incidents as to possibly avoid the term prop-strike, and its frequent need for a recommended or mandatory engine tear down. by the Federal Energy Regulatory Commission To be undiplomatic, dialing in a crank after a prop strike or sudden stoppage as has been defined by both the manufacturers and the FAA is essentially a fools errand-at least as possible decision making criteria on the serviceability of the crank. In short, there are many specific considerations to be evaluated post propstrike, and the manufacturer directives have more details than AC 43.13-1B, a reason why the AC is the second line of data/repair source, absent manufacturer data. The other thing to consider is all of the accessories on the engine or parts of the engine that are spinning at high speeds that could come Without even trying, the FAA did what hasn't been done since 9/11: It cleared the airspace of commercial traffic. Lycoming engines that specifically mentions prop strikes and mandates some degree of tear down, but not necessarily a full tear down, and only if it is a prop strike as opposed to a sudden stoppage. Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Atlanta ACO. For I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. A propeller strike is: (1) any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades as set forth in Part 1, B of this Service Bulletin or (2) any incident while the engine is operating in which the propeller makes contact with any object that results in a loss of engine RPM. Prop strike on Continental. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. The simple physics of a prop strike, in our opinion, makes a compelling case for an internal engine inspection with visual and thorough NDT techniques. These counterweights move on relatively soft bushings. All of the fractures have been grouped around certain manufacturing dates between April 1, 1998, and March 31, 2000, inclusive. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. This table of contents is a navigational tool, processed from the There used to be, but it was kind of informal and there was a lot open to interpretation. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a drop in revolutions per minute (RPM) and also requires structural repair of the propeller (incidents requiring only paint touch-up are not included). According to John DeJoris, president of Aircraft Propeller Service Inc., in Wheeling, IL, "The FAA has embraced the policy that any type of propeller strike is a cause for teardown and engine manufacturers are quickly jumping on board. SUMMARY: The FAA is adopting a new airworthiness directive (AD) that supersedes an existing AD, for Lycoming Engines (formerly Textron Lycoming), direct-drive You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. "You naturally think of the crankshaft and things that are directly connected to the engine, but you don't think of other accessories. In another incident a prop hit a small rock, which had been dislodged and thrown back by a larger aircraft. Issued in Burlington, Massachusetts, on November 13, 2000. In some cases we really take issue with some directives being a bit excessive, but the prop strike directives we believe are a pretty reasonable course to follow, even if you have the option to not follow them if you are a Part 91 operator or are not affected by AD 2004-10-14, which well address below. A tear down of most direct drive engines isnt a major repair but we recommend using a certified repair station or the factory for that action as well as the level of NDT testing will be significant and required to be done by certified people for such critical NDT inspections. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. TCM-powered aircraft operating under Part 135 of the FARs that have to comply with all manufacturers service bulletins would have to comply with Service Bulletin 96-11B, dealing with prop strikes, dated July 2008, requiring total disassembly and inspection after any incident that requires removal of the propeller for repairs or if the engine physically lost any rpms during the incident. Recent changes in the approach to propeller strikes dictated by Airworthiness Directives, engine manufacturer Service Letters, and insurance company policy have made anything less than a thorough teardown and NDT inspection unacceptable. This airworthiness directive (AD) applies to each engine identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. This is a minor or major prop repair issue, but not a potential engine tear down issue. Even with a small engine that is generating say, 150 horsepower; if that power just suddenly stops, the torque from the engine has to be dissipated somewhere. If you have a favorite mechanic, he may know someone in the area who will pull the enginethis takes only a few hoursand ship it wherever you want. That engine may be a time bomb, and an illegal one if the data plate is still on the engine, as after some mods it no longer qualifies as a certified engine, and may not be economically able to be recertified, depending on what was done to it. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. All rights reserved. (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. MSB 005C lists additional serial numbers (SN's) of affected engines and suspect crankshafts that were manufactured between April 1, 1998, and March 31, 2000, inclusive. This damage can result in catastrophic engine failure. In many instances prop strikes will fall into the major repair category, which necessitates repair station or manufacturer repair of the prop (if needed). 01/17/2023, 159 Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. (j) The preceding definitions include situations where an aircraft is stationary and the landing gear collapses causing one or more blades to be substantially bent, or where a hangar door (or other object) strikes the propeller blade. The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. There's also the cost of inspection of the accessories, which is extra. On Lycoming engines, which are not nitrided, the flange can be bent. Before I got to that, as you'd expect from a group of pilots and mechanics, arguments in my owner's group raged about the wording. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. Each document posted on the site includes a link to the certain lots, of steel production or forming operations. are not part of the published document itself. These markup elements allow the user to see how the document follows the Its possible to do major engine/accessory damage without obviously damaging the prop by hitting water or heavy, tall grass that stops or slows the running engine. We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. The degree of difficulty of this action will bevaried, depending on the installation and location of accessories, turbos, intercoolers, etc. include documents scheduled for later issues, at the request There's a tremendous amount of energy stored in the rotating flyweight, and when all of a sudden you stop the prop and engine, that energy has to be dissipated somewhere.". The alternator is turning 3000 rpm because of gearing. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 You could identify its sound with your eyes closed. Definition of Propeller Strike (i) For the purposes of this AD, a propeller strike is defined as follows: (1) Any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades. This could indicate a gear-up landing, or other source of damage that took time to fix. The Public Inspection page 01/17/2023, 249 can easily create significant internal stresses, such as stress cracks and loosened attaching hardware. This site displays a prototype of a Web 2.0 version of the daily There can be some major damage to mag drives, alternator drives, superchargers, gear boxes, pump drives, governor drives, etc. better and aid in comparing the online edition to the print edition. as a result of sudden stoppage. Not every prop strike results in sudden stoppage, but it doesn't take much to damage some of these accessories. AC 43.13-1B has lots of general information in Chapter 8 on prop strikes. Start dateSep 28, 2016. Effective December 12, 2000. to a sudden stop. All rights reserved. Sure, some of these arguments are specious, but the point is, there's a lot of gray area, and this can cause many incidents to be ignored. If you've attended AirVenture or any of the other major airshows, you've heard it. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. The MSB also describes procedures for removing a core sample of material from the propeller mounting flange of the crankshaft and for cleaning, chamfering, dye checking, and painting the core sample holes. Until the ACFR grants it official status, the XML ", In addition to regulatory changes and manufacturer recommendations, insurance companies are also playing a major role in determining what you do to your engine and prop. The answer is yes, you can ignore the directive to the same degree that any one who operates under Part 91 does with any other service directive without the force of an AD behind it. They either read full or I took the other SR20 this time and it was also broken, to the point where it shouldn't have been flown. offers a preview of documents scheduled to appear in the next day's In the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is ultimately up to the inspecting technician to determine if the engine should continue in service without total disassembly and inspection. And two, "The preceding definitions include situations where an aircraft is stationary and the landing gear collapses causing one or more blades to be substantially bent, or where a hangar door (or other object) strikes the propeller blade. After the extent of the inspection has been determined, it is important, as with any major repairs that are accomplished on your aircraft, to find out exactly what is included in the estimate to repair your engine following a prop strike. This amendment supersedes emergency airworthiness directive (AD) 2000-08-51. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of December 12, 2000. If it is determined that this emergency regulation otherwise would be significant under DOT Regulatory Policies and Procedures, a final regulatory evaluation will be prepared and placed in the Rules Docket. Click here for the Diesel Engines service bulletins. Well, for one i dont think i want to take out any of the clubs planes ever again. I bought the engine and started my quest to determine what I absolutely had to do to get the airplane airworthy. Unless, of course, you're not concerned about regulations or insurance issues, the general approach to how to handle a prop strike situation for the average maintenance shop has become quite, shall we say, conservative. Their decision would involve the specific engine involved, the severity of the prop damage, the cost, the time on the engine, whether the prop was stopped or appreciably slowed, who was flying at the time, what else is going on in the shop, and maybe the time of year and their mother's maiden name. TCM mandatory service bulletin (MSB) 005B, dated May 25, 2000, and MSB 005C, dated October 10, 2000, were issued to include the SN's of those additional suspect crankshafts. (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. This condition, if not corrected, could result in crankshaft connecting rod journal fracture, which could result in total engine power loss, in-flight engine failure and possible forced landing. has no substantive legal effect. Propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. 13132, because it would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. Hopefully, your insurance will soften the financial blow, and the factory bulletins should certainly be used as rationale for the need to do the tear-down. Most insurance carriers don't want to face the prospect of the engine or propeller leaving the aircraft due to a prop strike!". Compliance with this service bulletin is mandatory per AD 91-14-22. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. Lycoming's new SB seems to generalize the term propeller strike and sudden stoppage to be quite inclusive. FIND A DEALER. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. documents in the last year, 41 (1) Do the crankshaft material inspection (crankshaft propeller flange core sample) in accordance with sections A through J of TCM MSB 00-5C, dated October 10, 2000, as follows: (i) Use the specialized tools and equipment provided by TCM as listed in section A of TCM MSB 00-5C, dated October 10, 2000. Are any of the engines accessories inspected as they should be, and if so to what extent? documents in the last year, 12 Years ago, everyone would have filed off the other blades and not thought twice about it, but today, this engine disassembly requirement and prop inspection and repair ended up costing the owner around $5,000. Some elbow room? This occurred during several discrete periods, i.e. Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this notice must submit a self-addressed, stamped postcard on which the following statement is made: Comments to Docket Number 2000-NE-16-AD. The postcard will be date stamped and returned to the commenter. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". The pins are more than adequate for running loads, but they are totally inadequate when you subject them to sudden stoppage. DeJoris, who deals with propeller strike issues quite frequently says, "We recently had a customer with a prop strike who struck a steel stake that cut 1/4-inch of the tip off one blade of a three bladed prop. 2000-NE-16-AD, 12 New England Executive Park, Burlington, MA 01803-5299. This is one failure no one wants to experience. During the subsequent takeoff, the airplane's right wing hit the mirror of a semitruck, which veered the airplane into a fire truck and eventually a ditch. The OFR/GPO partnership is committed to presenting accurate and reliable They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. A propeller strike is: (1) any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades as set forth in Part I, B of this Service Bulletin or (2) any incident while the engine is operating in which the propeller makes contact with any object that results in a loss of engine RPM. for better understanding how a document is structured but Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. The argument goes would you rather be paying for an in flight engine failure 100 hours from now. For complete information about, and access to, our official publications These can be useful Compliance with this service bulletin is mandatory per AD 91-14-22. According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. These are the requirements as we see them. Copies may be inspected at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. legal research should verify their results against an official edition of Document page views are updated periodically throughout the day and are cumulative counts for this document. In this case however, there is an existing AD for quite a few differentLycoming engines that specifically mentions prop strikes and mandates some degree of tear down, but not necessarily a full tear down, and only if it is a prop strike as opposed to a sudden stoppage. ", Case in point Either may require additional inspection but neither may negate the inspections required by the FARs. This dream price just may be the cast off of a prop-strike incident that has been covered up or minimized in some way-or a prop with blades that are out of spec from metal removed from previous overhauls. Now that I had a definition, what would I have to do about such an event? ", DeJoris adds, "As a result, there is no real relationship today between the extent of damage of the prop and the type of inspection that has to be done to the engine. If possible, he suggests, mark the flange somehow, or take a photo of the scratches and nicks so you can compare it to the "new" one later. Since my engine is a TCM IO-520-L, I first went to Teledyne Continental Motors and found a service bulletin, which defined a prop strike and made recommendations about what to do. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. documents in the last year, 876 A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. This article originally appeared in the December 2012 issue of Light Plane Maintenance. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. New Documents If it has, and there's no indication in the engine logs about a teardown and inspection, it's time for a long explanation from the seller. documents in the last year, 830 It defines a sudden engine stoppage as; stopping an engine in one revolution or less for any reason, be it from propeller impact or from an engine failure of some sort. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. If the engine was assembled new, rebuilt, or overhauled on or before March 31, 1998, or on or after April 1, 2000, no action is required. Secure the airplane and figure that it will be out of commission for a few months. Dialing in the flange is worthless for this. Its not a smoking gun, but perusing the accident reports makes one wonder about such coincidences. on Inspect all engine accessories in accordance with the manufacturer's instructions.". documents in the last year, 946 Note the recurring theme of the loss of rpm or sudden stoppage of the engine runs as a key criteria for an internal inspection among the makers as well as the FAA. That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to As for dialing the flange, he said TCM nitrides the crank so checking the run-out of the flange is a waste of time. Section 39.13 is amended by adding the following new airworthiness directive: 2000-23-21 Teledyne Continental Motors: Amendment 39-11994. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further flight. Both Lycoming and Continental have very specific requirements for disassembly and inspection. I spoke with several shop owners and asked their opinion. Russell says, it should be noted that to comply with A.D. note 91-14-22, the engine does not need to be completely disassembled and that access to the accessory gear train can be accomplished, in most cases, with the engine still installed in the aircraft. (a) For those engines and crankshafts listed by SN in TCM MSB 00-5C, dated October 10, 2000, do the crankshaft material inspection (crankshaft propeller flange core sample) as follows: The engine SN's listed in TCM MSB 00-5C contain only the numerical portion of the SN. #1. Copies may be obtained from Teledyne Continental Motors, PO Box 90, Mobile, AL 36601; telephone toll free 1-888-200-7565, or on the TCM internet site www.tcmlink.com. The manufacturer directives are more specific as well as more restrictive in that any rpm loss on a prop strike is sufficient for the engine makers to call for an engine tear-down inspection. I've heard that a Continental doesn't require a tear down and inspection as a Lycoming does, but looking at Continental's Service Bulletin SB96-11B it looks Home. Some geared alternators shafts use gears that are designed to slip on overloads, but older versions of this alternator gear do not have this design, and the gear shear design is for an alternator failure not a crank stoppage. The FAA has determined that all of the defects were due to unique material composition characteristics combined with process control variations that occurred during the material melt process. My investigation started with my need for another engine for my Cessna 210. Is the engine being completely disassembled and inspected? Propeller strike inspections. And again, Chapter 8 of AC 43.13-1B is a good place to start gathering unbiased information. New posts Search forums. continental prop strike ad. A slam stop will detune the weights and damage the bushings so they can no longer do their job of helping to balance the crank while operating. It still could end up at a prop repair station if inspection deems it a prop major repair requirement depending on manufacturer inspection criteria of the prop. According to DeJoris, "Hartzell requires hub replacement if any blade in the assembly is bent beyond repair limits due to impact damage. The bulletin reads as follows: I watched the video and figured the pilot had reduced power before hitting the ditch. There was no sudden stoppage involved, but because of the wording in a related Lycoming AD note, the crankshaft gear in the back had to be checked and this required substantial disassembly of the engine. A prop-strike also imposes terrific jamming forces backward on the rear of the case-where the gearing is located and easily damaged. If the engine is being disassembled does the estimate include testing after reassembly? Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed. What other services or inspections are being performed at the same time as the inspection? This document has been published in the Federal Register. This AD, defines a propeller strike as follows: (i) For the purposes of this AD, a propeller strike is defined as follows: (1) Any incident, whether or not the engine is operating, that requires repair to the propeller other than minor blade dressing. "It" 2023 Aviation Publishing Group. Accessories can take quite a kinetic hit, and while it is specifically mot mentioned in the above AD, that is more of a focus issue. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. Anderson, owner of Corona Cylinder and Engine Overhaul, said the cost of a teardown and inspection, for a small four-cylinder engine like the O-360 or -320, is about $4,000. Jerry Robinette, Senior Engineer, Propulsion, Atlanta Aircraft Certification Office, FAA, Small Airplane Directorate, One Crown Center, 1895 Phoenix Blvd., Suite 450, Atlanta, GA 30349; telephone: (770) 703-6096, fax: (770) 703-6097. documents in the last year, 675 We dont have such trust unless we know a whole lot about who we are dealing with and have all the proper logs and background checks-especially in the Internet age there is no excuse to not do a lot of digging on who and what you are dealing with. stoppage inspection, we are your source for engine He's found that a major strike will probably stop an engine turning under 2,000 rpm, but over that speed the blades will usually bend. Are there any hidden costs? AC 43.13-1B has a great deal to say about what should be done in the manner of inspections and actions, and all the statements are preceded by the word must such as following the manufacturer directives as the priority action, with emphasis on the importance of a teardown when the event meets the criteria. documents in the last year. TCM-powered aircraft operating under Part 135 of the FARs that have to comply with all manufacturers service bulletins would have to comply with Service Bulletin 96-11B, dealing with prop strikes, dated July 2008, requiring total Plus, unless you were watching the tach, how would you know? Kiss the old days goodbye. The decision was made for me by an advertisement in Trade-A-Plane. Well discuss that distinction and exempt engines later in this article. Prop strike on Continental. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. Yet, the company recently published a new Service Bulletin, SB No. the official SGML-based PDF version on govinfo.gov, those relying on it for Bending loads alone are not the only destructive element, and nondestructive testing of the entire crank and associated structures is the only reasonable way to check it out. Other Lycoming literature mentions the importance to check the accessories as does TCM. Incidentally, the airplane's original equipment list showing the serial numbers of everything on the plane when it was built is available from the manufacturer. The President of the United States manages the operations of the Executive branch of Government through Executive orders. Pre-Flight. Fish and Wildlife Service Headquarters, Fora Area Brasileira FAB Comando da Aeronutica (Brazilian Air Force), Establishing the President's Advisory Council on African Diaspora Engagement in the United States, https://www.federalregister.gov/d/00-29496, MODS: Government Publishing Office metadata. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. We like to think that those we deal with are honest, however, there's a chance of impropiety by a seller, so when buying an airplane, be careful. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. Forums. Per the Lycoming website it is still an active bulletin, which we quote in part as follows: (It has all the same definitions found in AD 2004-10-14 that we printed in italics but has additional information): FAA Partners With Korea On Advanced Air Mobility, Guest Blog: Why Aircraft Engines Should Be Hard To Start, Southwest: The Ghost Of Jack Welch Part II, And Now, A ChatBot For All Your Aviation Questions, Best Of The Web: How The Rolls-Royce Merlin Became A World, Best Of The Web: Why Wingsuits Are Flight As Pure As, General Aviation Accident Bulletin, January 16, 2023, Top Letters And Comments, January 13, 2023, National Museum Of The U.S. Air Force Celebrates 100 Years, WAI Announces 2023 International Pioneer Hall of Fame Inductees, FAA To Expand Safety Management Systems Requirements, $10 Million Approved For Unleaded Avgas Evaluation, Garmin Wins FAA Nod For GFC 500 Autopilot Trim-Issue Fix, FAA Deletes Foreign Information From Sectionals, Ligado Facing Bankruptcy According To Lawsuit. (e) The actions required by this AD shall be performed in accordance with Teledyne Continental Motors MSB 00-5C, dated October 10, 2000. It is important to note that mandatory compliance with this AD is required as indicated before further flight if the engine has experienced a propeller strike as defined above, but per the compliance section of the AD it does not require compliance in the event of a sudden engine stoppage with no prop damage such as hitting tall grass. continental prop strike ad 21 May. However the dates that the engines and crankshafts were delivered may not coincide with their dates of manufacture. Are the minimum legal requirements being met? The energy typically finds paths throughout the engine and through the accessories and even to the engine mounts themselves. In this Issue, Documents Sep 28, 2016. It pretty much echoes the TCM service bulletin but adds two other situations. After defining a prop strike, TCM's SB 96-11A states: "A. Propeller strike inspections. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. Inspect all engine accessories in accordance with the manufacturer's instructions." Others will pay for all costs for the inspection and for any parts needed due to the incident. I won't list them all here, but some of the more expensive ones are: hydraulic valve lifters, connecting rod bearings, the crankshaft's main and thrust bearings, all needle, ball, and roller bearings, exhaust valves, valve springs, piston pins, pistons, crankcase through bolts, all the hardware, seals, gaskets, O-rings, and lots of other small stuff. Disregard the letter R.. We will not be discussing damage to the prop in this article since there is so much information on prop damage that does not involve engine tear downs. He also said prospective owners should review the logs to see if the propeller has been changed. On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. Continental Motors states: A propeller strike is: (1) any incident, whether or not the engine is operating, that requires repair to the propeller other than minor dressing of the blades as set You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. A bit of homework will go a long way towards helping you persuade your customer to do the right thing. The deffination of a prop strike is different on Lycomings than Continentals, Lycoming says any time a prop strikes any thing that will cause a loss of RPM it is a prop strike. documents in the last year, 973 daily Federal Register on FederalRegister.gov will remain an unofficial Always rely on the FAA certified inspecting technician, applicable service data and the FARs to dictate how thorough an inspection is necessary to continue the engine in service. in the separation of the propeller/rotor blade from the hub, the loss of a propeller/rotor blade tip or sudden stoppage following accidental propeller/rotor damage (such as propeller/rotor strike). A. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. He adds, "This limits their liability exposure. The flange will break before it bends. Then, put the pieces of the puzzle together for your customer and explain what needs to be done. But what is a prop strike and what exactly are the ramifications? Register documents. K. kevmor99. That said, you'll understand that this article isn't going to state, or even hint at, what you should do in this situation. For example, how much propeller filing constitutes "minor dressing?" What you see in the pictures is what you are getting. After watching the video, with the airplane careening into a ditch amid a cloud of dirt and debris, I figured that the engine I just purchased fit these definitions. Its entirely possible after a sudden engine stoppage for there to be severe internal damage and yet the prop looks perfectly OK even if the prop was either totally stopped or the rpm dropped by the incident. A Rule by the Federal Aviation Administration on 11/27/2000. John Schwaner, author of the Sky Ranch Engineering Manual, a must have for all those interested in aircraft engines, and owner of Sacramento Sky Ranch, in Sacramento, California, said the quandary is, "How do you know if something is good or not? Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. O-435, and TIO-541 series engines being exempt. Sticking with a certified repair facility possessing all the skills and tools will probably reduce the extra shipping costs and time involved to get individual parts examined seems most efficient to us. Service bulletins are one thing, but the real information comes from the people working in the field. Federal Register issue. documents in the last year, by the Fish and Wildlife Service Docket 2000-NE-16-AD. 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