This can cause major internal engine damage without visible prop damage. 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. 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. They either read full or TCM's SB 97-6 specifies the mandatory items that must be replaced when the engine is torn down. documents in the last year, 16 Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. 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. Some reports are quite specific about a recent prop strike in the engines history. Are any of the engines accessories inspected as they should be, and if so to what extent? 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. Refer McCauley Service Bulletin 137W. The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. Dialing in the flange is worthless for this. 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. on NARA's archives.gov. Its also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. Federal Register issue. Either may require additional inspection but neither may negate the inspections required by the FARs. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. Lycoming, in their prop-strike Service Bulletin 533A, takes the approach that the safest procedure is to take the engine apart for inspection following any incident involving propeller blade damage. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. 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). 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. 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. 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. For more than three decades, customers have trusted their airplanes to Triad Aviation, Inc. 12866. Both Lycoming and Continental have very specific requirements for disassembly and inspection. He adds, "This limits their liability exposure. stoppage inspection, we are your source for engine Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a slight stretch. AC 43.13-1B has lots of general information in Chapter 8 on prop strikes. 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. 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. But let me start this section with a caveat: There is no black and white, and the subject under discussion is the grayest of the gray areas. O-435, and TIO-541 series engines being exempt. 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. 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. 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. A prop-strike also imposes terrific jamming forces backward on the rear of the case-where the gearing is located and easily damaged. At Unlimited Aero Engines we know that things happen, and happen fast. Now that I had a definition, what would I have to do about such an event? 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. Moreover, the crank is not the only critical element in a prop-strike incident. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. 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. Is the engine being completely disassembled and inspected? 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. the material on FederalRegister.gov is accurately displayed, consistent with 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. That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. What other services or inspections are being performed at the same time as the inspection? 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. 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. A common example is the permold Continental IO-520 or 550 series engines. 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. A bit of homework will go a long way towards helping you persuade your customer to do the right thing. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to 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. karen rietz baldwin; hidden valley high Docket 2000-NE-16-AD. This table of contents is a navigational tool, processed from the These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. headings within the legal text of Federal Register documents. 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. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". (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. The President of the United States communicates information on holidays, commemorations, special observances, trade, and policy through Proclamations. TCM is less equivocal. by the Federal Energy Regulatory Commission The Public Inspection page the official SGML-based PDF version on govinfo.gov, those relying on it for But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. But what is a prop strike and what exactly are the ramifications? 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. Think of it as the equivalent of a high-speed twist drill, with great resistance to bending-it tends to snap or develop cracks from damage and fails suddenly. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. 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. (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. If you've attended AirVenture or any of the other major airshows, you've heard it. In this Issue, Documents 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. 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." Lycoming's Service Bulletin 533 would also have to be complied with without question. This amendment supersedes emergency airworthiness directive (AD) 2000-08-51. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. CONTINENTAL TSIO-520-J $18,995 FOR SALE Engine with Accessories TSMO=488.2 No Prop Strike Photos, logs, details per request. (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. The engine SN can be found in logbooks or other maintenance records. 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. And what's a "solid object?" Register, and does not replace the official print version or the official 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. 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? Sun Sep 23, 2018 8:02 pm. 01/17/2023, 159 Start dateSep 28, 2016. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. 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 FederalRegister.gov the most are "prop strike." 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. 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. documents in the last year, 84 It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. 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