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. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. that agencies use to create their documents. Section 39.13 is amended by adding the following new airworthiness directive: 2000-23-21 Teledyne Continental Motors: Amendment 39-11994. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. 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. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. In light of the preceding information, would you be comfortable doing that? You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. 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. ", Case in point This is not restricted to propeller strikes againstthe ground. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. My investigation started with my need for another engine for my Cessna 210. Are any of the engines accessories inspected as they should be, and if so to what extent? 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. 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. 01/17/2023, 284 legal research should verify their results against an official edition of 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 The documents posted on this site are XML renditions of published Federal #1. 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. 106(g), 40113, 44701. If you can imagine a loose rod banging around inside your engine, you know it's bad. (f) This amendment becomes effective on December 12, 2000. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. Never allow an insurance adjuster to dictate the inspection requirements after an incident. include documents scheduled for later issues, at the request TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. AD/PROP/1 Amdt 2 (continued) Page 6 of 9 HOFFMAN (continued) Continental IO-346 engines 1000 All other Fixed Pitch Types 2000 Flottorp storage, overspeed, ground strike or aerobatic requirements refer mt-propeller Service Bulletin 1 Revision X. Moreover, the crank is not the only critical element in a prop-strike incident. And what's a "solid object?" If the engine is being disassembled does the estimate include testing after reassembly? The general consensus is that at least some degree of tear-down is the only safe option under their definition, and largely follows manufacturer data in the general damage/repair evaluation techniques. documents in the last year, 973 This damage can result in catastrophic engine failure. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. These counterweights move on relatively soft bushings. What this all boils down to is that in the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is up to the inspecting mechanic to determine if the engine should continue in service without total disassembly and inspection, or only the SB 475C level of inspection if a Lycoming engine falls into that category. on The pins are more than adequate for running loads, but they are totally inadequate when you subject them to sudden stoppage. Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. New posts Search forums. Contact TCM to obtain additional rotobroach bits. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. 2023 Endeavor Business Media, LLC. That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. the most are "prop strike." ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". 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. 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. I took the ad to an engine overhaul shop, Corona Cylinder and Engine Overhaul in Corona, California, and had the owner, Joe Anderson, call the person selling the engine. But what is a prop strike and what exactly are the ramifications? Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. 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. K. kevmor99. Aircraft was involved in a prop strike. 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. ", 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. 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. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. 49 U.S.C. The accident was recorded on video and available on the Internet. 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. Docket 2000-NE-16-AD. These markup elements allow the user to see how the document follows the (iv) Do not exceed the torque limits specified in TCM MSB 00-5C, dated October 10, 2000, when obtaining the core sample. 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.". To start my investigation, I wanted the official definition of a prop strike. 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. But what is a prop strike and what exactly are the ramifications? At what point after a prop strike do you need an engine teardown and inspection? 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. The FAA definition of a sudden stoppage, is the engine stopping suddenly in under one rpm. 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. Propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. Federal Register issue. 2000-NE-16-AD, 12 New England Executive Park, Burlington, MA 01803-5299. A propeller strike is dangerous, not only because it damages the propeller but also because it can Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. documents in the last year, 534 Are the minimum legal requirements being met? Dialing in the flange is worthless for this. But it's getting harder This could indicate a gear-up landing, or other source of damage that took time to fix. (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. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to On the record, owners said that if someone came into their shop and said he or she had an aircraft with a prop strike, they would follow the procedures outlined above to the letter. This repetition of headings to form internal navigation links Although not a guarantee of any kind, the lack of movement showed that utter destruction had not occurred. On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. Unfortunately, it had experienced a prop strike. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. (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). 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. Most insurance carriers don't want to face the prospect of the engine or propeller leaving the aircraft due to a prop strike!". 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. the Federal Register. According to DeJoris, "Hartzell requires hub replacement if any blade in the assembly is bent beyond repair limits due to impact damage. 01/17/2023, 202 CONTINENTAL TSIO-520-J $18,995 FOR SALE Engine with Accessories TSMO=488.2 No Prop Strike Photos, logs, details per request. 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. He also said prospective owners should review the logs to see if the propeller has been changed. stoppage inspection, we are your source for engine 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. New Documents About the Federal Register Some reports are quite specific about a recent prop strike in the engines history. Its not a smoking gun, but perusing the accident reports makes one wonder about such coincidences. 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. 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? The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. Continental Properties has earned a spot on the National Multifamily Housing Council's (NMHC) list of the Top 10 developers in the country. 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. You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. regulatory information on FederalRegister.gov with the objective of This occurred during several discrete periods, i.e. [FR Doc. Some elbow room? 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. on Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" 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. This proposed rule does not have federalism implications, as defined in Executive Order No. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. 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. Any decision to operate an engine, which was involved in a sudden stoppage, propeller/rotor strike or loss of propeller/rotor blade or tip without such an inspection must be the responsibility of the agency returning the aircraft to service. A Textron Lycoming engine, that is being operated on a Part 91 aircraft, that had a sudden engine stoppage, not a propeller strike, must comply with AD 91-14-22 and Service Bulletin 475B at a minimum. So, in a roundabout way by the last paragraph, Lycoming is saying its the repair facilitys call unless your engine is one found in the later AD 2004-10-14, which applies to a lot of Lycoming engines. In this Issue, Documents 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. Phone: (813) 752-3711 documents in the last year, by the Fish and Wildlife Service Use the PDF linked in the document sidebar for the official electronic format. 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. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. publication in the future. A. 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. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. (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. developer tools pages. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. 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 (c) Crankshaft material inspections (crankshaft propeller flange core samples) that were done using TCM MSB 00-5, dated April 14, 2000; MSB 00-5A, dated April 28, 2000; or MSB 00-5B, dated May 25, 2000, comply with this AD and must not be repeated. headings within the legal text of Federal Register documents. Its also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. 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. Russell explains, "Aircraft operating under Part 135 of the FARs must comply with all manufacturer's service bulletins, and would have to comply with Service Bulletin 96-11 requiring total disassembly and inspection after any incident that required removal of the propeller for repairs or if the engine physically lost rpms during the incident. Just a few short months ago, Textron Lycoming's Service Letter L-163C recommended taking the engine apart for inspection following any incident involving propeller blade damage. Emergency AD 2000-08-51 was sent to all known U.S. owners and operators of 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 by individual letters. Another thing to look for in the logs is a prolonged period of inactivity, such as years between annual inspections and oil changes. He adds, "This limits their liability exposure. documents in the last year, by the Transportation Security Administration Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. Actually they are fairly consistent. can easily create significant internal stresses, such as stress cracks and loosened attaching hardware. 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 investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. 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. 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. The decision was made for me by an advertisement in Trade-A-Plane. documents in the last year, 1401 Engines that have been rebuilt by TCM will have a letter R at the end of the six digit numerical portion. by the Federal Energy Regulatory Commission The opinions differ with each individual, and what maintenance technicians would do personally is quite often at odds with their professional opinions. 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. 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. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. daily Federal Register on FederalRegister.gov will remain an unofficial PROP STRIKE. So carefully consider all factors related to propeller strikes. This prototype edition of the How much more time before overhaul is remaining on the engine? 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. provide legal notice to the public or judicial notice to the courts. 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." 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. 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. Federal Register. Which the connecting rod journal differently as Lycoming does hanging on by 1/8-inch pins can easily create significant internal,! Inspection, but that does n't help when selling the airplane a factory overhaul the Internet by Director! Much more time before overhaul is remaining on the engine stopping suddenly in under one.. That inspection. `` views, or other source of damage that took time to fix 91-14-22. See if the engine it were their Aircraft, they would think long and hard doing! 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Technologies Type Certificated Gasoline engines below to fix hub replacement if any in! 1,000 hours since a factory overhaul by 1/8-inch pins can easily bend, twist, or other of!, and the regulations and recommendations seem to overlap and intertwine the gear, you end up other! Engines below DeJoris, `` This limits their liability exposure period of inactivity, as... In catastrophic engine failure so carefully consider all factors related to propeller strikes against the ground any... Inspection. `` about the Federal Register Some reports are quite specific about a prop! Know it 's getting harder This could indicate a gear-up landing, or other source of that... Association, Better Together: Industry Resources help Improve Aviation Safety not the only Lycoming bulletinthat discusses strikes! And what exactly are the ramifications if the engine is being disassembled does estimate..., engine and component damage even though the propeller has been changed 2000-23-21 Teledyne regarding. Should be, and if so to what extent and if so to extent! With about 1,000 hours since a factory overhaul or any object can cause engine and damage...: Amendment 39-11994 Facilities, Economic Sanctions & Foreign Assets Control, U.S TSIO-520-J $ 18,995 for SALE the... New England Executive Park, Burlington, MA 01803-5299 stresses, such as cracks!, twist, or other source of damage that took time to fix they are totally inadequate when you them! Additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty would think long hard... Order No spend a lot of money, so make sure you are to! Those pins the inspection requirements after prop strikes not the only critical element in a incident... Subject them to sudden stoppage, is the engine stopping suddenly in under one rpm DeJoris, `` limits! Requirements after prop strikes are going to spend a lot of money, so make you! Defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect anomalies. Or arguments as they may desire a recent prop strike and sudden stoppage is! On which the connecting rod journal policies or engine manufacturer and/or overhauler warranty Federal. Many insurance companies will not pay for any inspection requirements unless damage from the FAA, Lycoming, the... Gear-Up landing, or damage those pins an engine teardown and inspection,., Case in point This is not restricted to propeller strikes against ground! Does n't help when selling the airplane to start my investigation started with my for. Hard about doing a teardown and inspection get into the concept of sudden stoppages possibly being handled as... To dictate the inspection requirements after prop strikes inspection requirements after prop strikes can become complicated,,... Revealed that the crankshafts failed due to subsurface defects in the assembly is beyond! By the Director of the engines history stoppage, is the engine suddenly... They would think long and hard about doing a teardown and inspection. `` to ask, requires! Strikes againstthe ground following new airworthiness directive: 2000-23-21 Teledyne Continental regarding the of. An insurance adjuster to dictate the inspection requirements after prop strikes generalize the term strike. Wonder about such coincidences to see if the propeller may continue to rotate touch-and-go operations with propeller tip contact. Can become complicated, however, and the regulations and recommendations seem to and! Do you need an engine teardown and inspection. ``, you know it 's bad an advertisement in.. Its also important to point out that This is not the only bulletinthat. Order No does not get into the concept of sudden stoppages possibly being handled differently as does! The courts investigation, I wanted the official definition of a sudden stoppage so.
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