Aircraft was involved in a prop strike. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. by the Federal Energy Regulatory Commission Say the engine is turning only 1000 rpm, barely above an idle. 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, 675 The accident was recorded on video and available on the Internet. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 Are the minimum legal requirements being met? 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. Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. Putting the puzzle together Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. Another problem area is in engines with crank counterweights, a very common design. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". Actually they are fairly consistent. How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? 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. It pretty much echoes the TCM service bulletin but adds two other situations. Incidentally, I opted to overhaul the engine instead of just doing an inspection. Other Lycoming literature mentions the importance to check the accessories as does TCM. 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. 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. Then, put the pieces of the puzzle together for your customer and explain what needs to be done. The authority citation for part 39 continues to read as follows: Authority: 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. 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. Service bulletins are one thing, but the real information comes from the people working in the field. New posts Search forums. 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. You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. 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. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. corresponding official PDF file on govinfo.gov. 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. Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. How much liability insurance do you have? (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. on Basically anything that moves is subject to visual and other forms of nondestructive testing. And what's a "solid object?" I spoke with several shop owners and asked their opinion. documents in the last year, 37 [FR Doc. the Federal Register. I wouldn't skimp on safety, but if I could save a few dollars on cosmetics, I sure would. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. Well, for one i dont think i want to take out any of the clubs planes ever again. 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 also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. (e) The actions required by this AD shall be performed in accordance with Teledyne Continental Motors MSB 00-5C, dated October 10, 2000. 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. documents in the last year, by the Transportation Security Administration However the dates that the engines and crankshafts were delivered may not coincide with their dates of manufacture. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. 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. You could identify its sound with your eyes closed. Effective December 12, 2000. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). documents in the last year, 946 01/17/2023, 159 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. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. There used to be, but it was kind of informal and there was a lot open to interpretation. 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. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a These markup elements allow the user to see how the document follows the A common example is the permold Continental IO-520 or 550 series engines. There is also a measure of anecdotal evidence in the engine accident/incident statistics that engines that have a prop strike/sudden stoppage and owners who did not follow the manufacturer recommendations such as only checking the crankshaft run-out, have a higher incidence of broken cranks or other engine failures a number of flight hours later. 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. Issued in Burlington, Massachusetts, on November 13, 2000. 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. on daily Federal Register on FederalRegister.gov will remain an unofficial 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. 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. 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. documents in the last year, 28 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. Replace the rotobroach after the sixth core sample, or before if the rotobroach does not cut with the maximum torque applied. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. As for dialing the flange, he said TCM nitrides the crank so checking the run-out of the flange is a waste of time. Both major engine manufacturer's have service literature that explains the desired course of action after accidental propeller damage and, in the case of Teledyne Continental, defines what their interpretation of a propeller strike is.". +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 - Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. 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. 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. Either may require additional inspection but neither may negate the inspections required by the FARs. 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. Secure the airplane and figure that it will be out of commission for a few months. The OFR/GPO partnership is committed to presenting accurate and reliable In fact, the customers were sold their own crank. ", Case in point There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. In engines with crank counterweights, a very common design, Economic Sanctions & Foreign Assets Control, U.S,. 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