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.". as a result of sudden stoppage. Contact TCM to obtain additional rotobroach bits. Panagotacos recently paid $66 for the list of a 1956 Cessna 182, which is in his shop. Still others will only pay for the labor to do the job and will not pay for any parts. developer tools pages. Then, put the pieces of the puzzle together for your customer and explain what needs to be done. Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. Maybe it is and maybe it isn't." That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. A prop-strike also imposes terrific jamming forces backward on the rear of the case-where the gearing is located and easily damaged. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. 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. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. the Federal Register. Thread starterkevmor99. the material on FederalRegister.gov is accurately displayed, consistent with (2) After obtaining the results of the core sample evaluation, disposition the crankshaft as follows: (i) If TCM notifies you that the crankshaft is not serviceable, replace the crankshaft with a serviceable crankshaft of the same part number before further flight. This damage can result in catastrophic engine failure. The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. Putting the puzzle together Moreover, 43.13-1B mandates the use of approved manufacturer data (providing it exists) rather than 43.13-1B data as the required source of both inspection and repair information (Manufacturer data will be more current with more detail and part specific is the thinking). We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. 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. 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. That said, you'll understand that this article isn't going to state, or even hint at, what you should do in this situation. Kiss the old days goodbye. 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've heard that a Continental doesn't require a tear Actually they are fairly consistent. 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. The decision was made for me by an advertisement in Trade-A-Plane. TCM is less equivocal. The thought of the damage and cost involved makes all of us shudder. Are any of the engines accessories inspected as they should be, and if so to what extent? documents in the last year, by the Federal Communications Commission documents in the last year, by the Fish and Wildlife Service Off the record, most of the shop owners said they find evidence of internal damage in only about 10 to 20 percent of the engines they've torn down. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. Sep 28, 2016. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. 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. 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. 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. 533 called "Recommendations Regarding Accidental Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip.". Well, for one i dont think i want to take out any of the clubs planes ever again. In our response to readers we quote the latest manufacturer directives and FAA guidance, and add our perspectives and experience to hopefully help the owner feel his or her ultimate decision is the right and legal one. 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. 552(a) and 1 CFR part 51. 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. 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. In this Issue, Documents Federal Register issue. 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. 01/17/2023, 249 They either read full or 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. This prototype edition of the the most are "prop strike." All rights reserved. Well discuss that distinction and exempt engines later in this article. on Yet, the company recently published a new Service Bulletin, SB No. Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. This is not restricted to propeller strikes againstthe ground. 106(g), 40113, 44701. 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. for better understanding how a document is structured but Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. 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. Unfortunately, it may be the next owner who discovers any hidden damage. This could indicate a gear-up landing, or other source of damage that took time to fix. dont do it. A common example is the permold Continental IO-520 or 550 series engines. what would martial law in russia mean phoebe arnstein wedding joey michelle knight son picture brown surname jamaica. The actions specified by this AD are intended to prevent fracture of the crankshaft connecting rod journal, which could result in total engine power loss, in-flight engine failure and possible forced landing. This damage can result in catastrophic engine failure. 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. 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. continental prop strike ad. At what point after a prop strike do you need an engine teardown and inspection? documents in the last year, by the Veterans Affairs Department The concern, of course, is the prospect of hidden damage, which can cause, and has caused, subsequent engine failures. I watched the video and figured the pilot had reduced power before hitting the ditch. 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. The FAA has reviewed and approved the technical contents of TCM Mandatory Service Bulletin (MSB) 005C, dated October 10, 2000. You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. 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. It pretty much echoes the TCM service bulletin but adds two other situations. ", 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. documents in the last year, 480 Should he also have performed the obligatory engine inspections? SUMMARY: The FAA is adopting a new airworthiness directive (AD) that supersedes an existing AD, for Lycoming Engines (formerly Textron Lycoming), direct-drive Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to Or it was known to have been used on a plane that crashed or was somehow damaged or is missing a complete set of engine logs or some parts. 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. The authority citation for part 39 continues to read as follows: Authority: My investigation started with my need for another engine for my Cessna 210. 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. Without even trying, the FAA did what hasn't been done since 9/11: It cleared the airspace of commercial traffic. These tools are designed to help you understand the official document "It" 2023 Aviation Publishing Group. 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. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. In another incident a prop hit a small rock, which had been dislodged and thrown back by a larger aircraft. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. Sun Sep 23, 2018 8:02 pm. 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. karen rietz baldwin; hidden valley high electronic version on GPOs govinfo.gov. Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. 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. Prop strike on Continental. The pins are more than adequate for running loads, but they are totally inadequate when you subject them to sudden stoppage. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it. daily Federal Register on FederalRegister.gov will remain an unofficial 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. documents in the last year, 84 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. If you can imagine a loose rod banging around inside your engine, you know it's bad. The opinions differ with each individual, and what maintenance technicians would do personally is quite often at odds with their professional opinions. All rights reserved. In many instances prop strikes will fall into the major repair category, which necessitates repair station or manufacturer repair of the prop (if needed). 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. from 54 agencies. AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -. 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. Not every prop strike results in sudden stoppage, but it doesn't take much to damage some of these accessories. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. One, "A sudden rpm drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred." The Public Inspection page (e) The actions required by this AD shall be performed in accordance with Teledyne Continental Motors MSB 00-5C, dated October 10, 2000. documents in the last year, 946 These are the requirements as we see them. Comments may also be sent via the Internet using the following address: 9-ane-adcomment@faa.gov. Comments sent via the Internet must contain the docket number in the subject line. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". Forums. For more than three decades, customers have trusted their airplanes to Triad Aviation, Inc. 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. 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 So my question was, should I overhaul the present engine or look for one with good logs? Even tip damage is considered cause for teardown 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. 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. by the Federal Energy Regulatory Commission 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. TCM is less equivocal. The bulletin reads as follows: 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. Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. 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. 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. Effective December 12, 2000. 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. Refer McCauley Service Bulletin 137W. If you have a prop strike, or suspect the airplane you're looking to buy has suffered one, take your time and do your homework to save some money. 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. Continued evaluation of crankshafts lots with serial numbers (SN's) other than those that were listed in AD 2000-08-51, has detected the same condition in those crankshaft lots. 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. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. 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. 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. This is one failure no one wants to experience. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). 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." 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 or she feels that it is the prudent and responsible thing to do. It is not an official legal edition of the Federal These counterweights move on relatively soft bushings. After defining a prop strike, TCM's SB 96-11A states: "A. O-435, and TIO-541 series engines being exempt. Another thing to look for in the logs is a prolonged period of inactivity, such as years between annual inspections and oil changes. One of the issues that is particularly hard to quantify if you elect not to tear an engine down, post strike and choose to disregard the fairly specific diagnostic procedures that the engine makers put out is do you have the FAA legal option of ignoring the service directives? I spoke with several shop owners and asked their opinion. 01/17/2023, 202 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. 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. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. If you need someone to remove and reinstall the engine, that's another $1,800. 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. 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. This is a minor or major prop repair issue, but not a potential engine tear down issue. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. Another problem area is in engines with crank counterweights, a very common design. Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. documents in the last year, 830 Continental Properties has earned a spot on the National Multifamily Housing Council's (NMHC) list of the Top 10 developers in the country. 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. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further flight. Phone: (813) 752-3711 (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. 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. 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 & Crankshafts with this type of subsurface defect will fail. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. 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? After finding out the answer to these questions, its time to discuss with your insurance company what it will pay for and what it wont, before its a big surprise after the inspection is done. to a sudden stop. For complete information about, and access to, our official publications You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. If the engine is being disassembled does the estimate include testing after reassembly? 49 U.S.C. Section 39.13 is amended by adding the following new airworthiness directive: 2000-23-21 Teledyne Continental Motors: Amendment 39-11994. has no substantive legal effect. Do we think the engine makers are overly eager to have you tear down or dig into your engine? 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. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. The OFR/GPO partnership is committed to presenting accurate and reliable 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. FIND A DEALER. Document page views are updated periodically throughout the day and are cumulative counts for this document. Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. headings within the legal text of Federal Register documents. Aircraft Owners & Pilots Association Find it free on the store. 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. For The thought of the damage and cost involved makes all of us shudder. A Rule by the Federal Aviation Administration on 11/27/2000. Some reports are quite specific about a recent prop strike in the engines history. 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. Engines that have been rebuilt by TCM will have a letter R at the end of the six digit numerical portion. documents in the last year, 28 Although this action is in the form of a final rule that involves requirements affecting flight safety and, thus, was not preceded by notice and an opportunity for public comment, comments are invited on this rule. ", 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. 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. This may seem to contradict itself since sudden stoppage is mentioned earlier in the AD in the prop strike-definitions section, but thats the way it is written with an orientation to certain types of direct drive Lycoming engines, with only Lycoming O-145, O-320H, O-360E, LO-360E, LTO-360E,O-435, and TIO-541 series engines being exempt. , it may be the next owner who discovers any hidden damage inactivity, as! Another thing to look for in the subject line the nitride hardened cranks a! 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