that agencies use to create their documents. For 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. Pre-Flight. 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. 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. 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. He also said that if you have a prop strike while traveling, don't go to the first shop you see and turn the airplane over to it. 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. Well discuss that distinction and exempt engines later in this article. The FAA definition of a sudden stoppage, is the engine stopping suddenly in under one rpm. (iii) Maintain a record of each core sample obtained with each rotobroach bit used. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. 552(a) and 1 CFR part 51. Mahlon Russell, production manager for Mattituck Aviation Corporation, an engine overhauler in Mattituck, NY, says, "The only pertinent FAA definition that I have been able to find for sudden stoppage' is in Advisory Circular 43.13-1A. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. on 01/17/2023, 823 Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. Its not a smoking gun, but perusing the accident reports makes one wonder about such coincidences. establishing the XML-based Federal Register as an ACFR-sanctioned 01/17/2023, 249 A prop strike can happen to anyone at anytime, but fortunately, few involve injury. Our designation as a Cessna Service Center and authorization as a parts and engine distributor for both Lycoming and Continental 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. A prop that hits so hard as to bend the crank flange is only one of several considerations. 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. I bought the engine and started my quest to determine what I absolutely had to do to get the airplane airworthy. Are any of the engines accessories inspected as they should be, and if so to what extent? 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. There's also the cost of inspection of the accessories, which is extra. This prototype edition of the 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. electronic version on GPOs govinfo.gov. In light of the preceding information, would you be comfortable doing that? To start my investigation, I wanted the official definition of a prop strike. 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. has no substantive legal effect. For complete information about, and access to, our official publications on Are there any hidden costs? Aircraft was involved in a prop strike. Information about this document as published in the Federal Register. This repetition of headings to form internal navigation links Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" 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. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. Unfortunately, it may be the next owner who discovers any hidden damage. 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. 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. Some reports are quite specific about a recent prop strike in the engines history. 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. So, when it comes time for that prop strike/sudden. 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. How much liability insurance do you have? The rationale for this hub retirement criteria revolves around the fact that forces great enough to bend blades beyond their respective repair limits represent loads that are in excess of those that the hubs were designed to withstand, while providing sufficient structural safety margins.". 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. AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -. 01/17/2023, 202 Until the ACFR grants it official status, the XML Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. 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. 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. 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. 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. developer tools pages. Thread starterkevmor99. Recently, a transient aircraft hit a rubber traffic cone with the prop and kept going, taking off and disappearing into the western sky. 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. documents in the last year, 973 on The concern, of course, is the prospect of hidden damage, which can cause, and has caused, subsequent engine failures. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); WORLD'S PREMIER INDEPENDENT AVIATION NEWS RESOURCE. 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. Issued in Burlington, Massachusetts, on November 13, 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. The engine SN can be found in logbooks or other maintenance records. Prior to any ground operation of the engine assure that the propeller flange and the crankshaft flange area are free of any crack indications in addition to the engine component inspection. FAA# JL4R288M | EASA.145.4115 | Toll Free: 800-282-3202 | 954-970-3200 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. 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 & Moreover, the crank is not the only critical element in a prop-strike incident. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. For example, how much propeller filing constitutes "minor dressing?" karen rietz baldwin; hidden valley high 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. Document page views are updated periodically throughout the day and are cumulative counts for this document. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. Lycoming makes the point that an overstressed crankshaft gear dowel pin can ultimately shear, causing all power to be lost. The pressure from an owner to ignore the engine and fix the prop may be great, but it is certainly in the best interest of the mechanic's career to persuade the owner that any amount of damage to the propeller constitutes the need for a thorough inspection. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. 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. If you've attended AirVenture or any of the other major airshows, you've heard it. So my question was, should I overhaul the present engine or look for one with good logs? This year's numbers have placed us in the top 10, highlighting another strong year of property development. 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