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continental prop strike ad

März 09, 2023
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Even tip damage is considered cause for teardown The OFR/GPO partnership is committed to presenting accurate and reliable Also, on prop strikes involving frontal impact, the crank can be pushed back into the engine, cracking the case at the slinger ring, and this may not be visible. offers a preview of documents scheduled to appear in the next day's Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. 552(a) and 1 CFR part 51. Other Lycoming literature mentions the importance to check the accessories as does TCM. PROP STRIKE. Refer McCauley Service Bulletin 137W. The one that came with the airplane had passed TBO (time between overhauls) but its logbooks didn't go back to when it came from the factory. Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. 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. 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. Disregard the letter R.. The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. 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). 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. 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. Is the engine being completely disassembled and inspected? documents in the last year, 675 (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. Basically the fuel gauges in the center console are shorting out. If you need someone to remove and reinstall the engine, that's another $1,800. electronic version on GPOs govinfo.gov. 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 prototype edition of the 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. That said, you'll understand that this article isn't going to state, or even hint at, what you should do in this situation. Some elbow room? continental prop strike ad. As mentioned earlier, Advisory Circular 43.13-1B, Chapter 8 defines a sudden engine stoppage as stopping an operating engine in one revolution or less for any reason, period, and includes prop-strike damage as a subset of the of sudden stoppage definition (at least the way we interpret the way it is written). There are other things that have to be checked, including the magnetos, propeller governor, and fuel system. 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). 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. A. developer tools pages. 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 disassembly and inspection after any incident that requires removal of the propeller for repairs or if the engine physically lost any rpms during the incident. 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. Are there any hidden costs? As for dialing the flange, he said TCM nitrides the crank so checking the run-out of the flange is a waste of time. 01/17/2023, 823 ", 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. 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. For crankshafts identified in paragraph (a) of this AD, TCM has already determined which engines have a new suspect crankshaft installed and have identified those engines by engine SN. Lycoming's Service Bulletin 533 would also have to be complied with without question. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. So, when it comes time for that prop strike/sudden. We can even see situations where a prop sustains a fairly nasty nick in a gravel strip, but no rpm loss occurs or serious blade damage occurs. This is not restricted to propeller strikes againstthe ground. There's also the cost of inspection of the accessories, which is extra. 2023 Endeavor Business Media, LLC. O-435, and TIO-541 series engines being exempt. This can cause major internal engine damage without visible prop damage. 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. Forums. 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. 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. 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. Lycoming's new SB seems to generalize the term propeller strike and sudden stoppage to be quite inclusive. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. Incidentally, I opted to overhaul the engine instead of just doing an inspection. My investigation started with my need for another engine for my Cessna 210. 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. Recently, a transient aircraft hit a rubber traffic cone with the prop and kept going, taking off and disappearing into the western sky. documents in the last year, 12 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. 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. 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. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. 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 oil pump on the Continental IO-360 is driven by a very small shaft, for instance, and can be easily sheared as a result of a strike," says DeJoris. Phone: (813) 752-3711 (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. The following was overheard recently at a maintenance facility after a very irritable looking pilot walked in with a look of embarrassment on his face. During the subsequent takeoff, the airplane's right wing hit the mirror of a semitruck, which veered the airplane into a fire truck and eventually a ditch. 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. 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. 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. Consider the accessories. Both Lycoming and Continental have very specific requirements for disassembly and inspection. Moreover, the crank is not the only critical element in a prop-strike incident. documents in the last year, 876 (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 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. The $8,500 differential is not insignificant. Including the magnetos, propeller governor, and fuel system checking the run-out of the accessories does! Reinstall the engine, that 's another $ 1,800 I opted to overhaul the engine that... Cause major internal engine damage without visible prop damage someone to remove and reinstall the engine instead of doing... 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