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. documents in the last year, 274 Service bulletins are one thing, but the real information comes from the people working in the field. better and aid in comparing the online edition to the print edition. The degree of difficulty of this action will bevaried, depending on the installation and location of accessories, turbos, intercoolers, etc. ", 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. Dialing in the flange is worthless for this. Maybe it is and maybe it isn't." 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. 2 Blade Continental O-200/Lycoming O-235 Ground Adjustable STOL Propeller $ 74CK $ 76AK-2 $ FIND A DEALER NEAR YOU. Re: O-360 propeller indexing (noticeable slight vibration) Lycoming O-360 A-1As (and every other O-360 Ive met) propellers should be indexed such that the propeller stops at the 10 and 4 o'clock position (viewed from the front facing aft) when the engine shuts down. I wouldn't skimp on safety, but if I could save a few dollars on cosmetics, I sure would. The bulletin reads as follows: Propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. 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. 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. 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. Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB. 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. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. 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. 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. At Unlimited Aero Engines we know that things happen, and happen fast. These counterweights move on relatively soft bushings. A prop that hits so hard as to bend the crank flange is only one of several considerations. 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. 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. 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. This article originally appeared in the December 2012 issue of Light Plane Maintenance. Register, and does not replace the official print version or the official Use the PDF linked in the document sidebar for the official electronic format. legal research should verify their results against an official edition of Its also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. documents in the last year, 37 regulatory information on FederalRegister.gov with the objective of The thought of the damage and cost involved makes all of us shudder. 106(g), 40113, 44701. by the Federal Energy Regulatory Commission Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. documents in the last year, 84 establishing the XML-based Federal Register as an ACFR-sanctioned 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. ", Airworthiness Directive 2004-10-14 is applicable to Lycoming engines that experienced a prop strike. Actually they are fairly consistent. And anyway, who needs NOTAMs? 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. 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 bit of homework will go a long way towards helping you persuade your customer to do the right thing. The flange will break before it bends. They either read full or Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 daily Federal Register on FederalRegister.gov will remain an unofficial Now I had to determine the consequences. (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. Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the rule. Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. electronic version on GPOs govinfo.gov. documents in the last year, 675 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. New posts Search forums. 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. Over the years, Continental has built a service offering for aircraft operators and owners These services include engine overhauls at the Continental factory service center for Continental, Titan, and LYCOMING engines, factory overhauls for Continental AvGas engines, sudden stoppage/propeller strikes, shock inspections, fleet overhaul programs, Jet-A burning engine Some geared alternators shafts use gears that are designed to slip on overloads, but older versions of this alternator gear do not have this design, and the gear shear design is for an alternator failure not a crank stoppage. McCauley hubs must be retired if any of the blades within the assembly are bent beyond repair limits inboard of the 85 percent blade radius. Dealing with them on this issue is fodder for another article, however. Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. The pins are more than adequate for running loads, but they are totally inadequate when you subject them to sudden stoppage. Each document posted on the site includes a link to the 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. 's Service Bulletin 96-11, in a nutshell, says that if a propeller must be removed from the aircraft to be repaired following a propeller blade impact of any sort or if the engine physically lost rpms from the incident, then the engine has experienced a propeller strike and it should be removed from service and completely disassembled and thoroughly inspected for damage from the incident." While every effort has been made to ensure that 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. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. documents in the last year, by the Transportation Security Administration 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. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. Teledyne Continental Motors has a slightly different approach, but not much different in practice. This site displays a prototype of a Web 2.0 version of the daily 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. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. 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. Thread starterkevmor99. This year's numbers have placed us in the top 10, highlighting another strong year of property development. If the engine is being disassembled does the estimate include testing after reassembly? At what point after a prop strike do you need an engine teardown and inspection? DeJoris says he is dealing with claims adjusters on a regular basis, and many adjusters today choose to have you go the extra mile and tear down the entire engine and propeller and do a thorough inspection." rendition of the daily Federal Register on FederalRegister.gov does not This could indicate a gear-up landing, or other source of damage that took time to fix. My investigation started with my need for another engine for my Cessna 210. 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. No more filing blades a bit shorter after a tip strike, or performing a run-up and signing off on an engine after the runway lights have been mowed a bit shorter. This document has been published in the Federal Register. 552(a) and 1 CFR part 51. Moreover, the crank is not the only critical element in a prop-strike incident. 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. We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. 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. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. Type of operator/engine makes a difference documents in the last year, 28 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. Issued in Burlington, Massachusetts, on November 13, 2000. documents in the last year, 90 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. documents in the last year, by the Fish and Wildlife Service documents in the last year. PROP STRIKE. About the Federal Register S/N: 217920-73J Contact Sales Staff - TEXAS AIR SALVAGE, - located Bloomburg, TX 75556 United States Telephone: 9032557878 Posted January 9, 2023 Show all Ads posted by this Advertiser Recommend This Ad to a Friend This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. 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. Per the Lycoming website it is still an active bulletin, which we quote in part as follows: (It has all the same definitions found in AD 2004-10-14 that we printed in italics but has additional information): FAA Partners With Korea On Advanced Air Mobility, Guest Blog: Why Aircraft Engines Should Be Hard To Start, Southwest: The Ghost Of Jack Welch Part II, And Now, A ChatBot For All Your Aviation Questions, Best Of The Web: How The Rolls-Royce Merlin Became A World, Best Of The Web: Why Wingsuits Are Flight As Pure As, General Aviation Accident Bulletin, January 16, 2023, Top Letters And Comments, January 13, 2023, National Museum Of The U.S. Air Force Celebrates 100 Years, WAI Announces 2023 International Pioneer Hall of Fame Inductees, FAA To Expand Safety Management Systems Requirements, $10 Million Approved For Unleaded Avgas Evaluation, Garmin Wins FAA Nod For GFC 500 Autopilot Trim-Issue Fix, FAA Deletes Foreign Information From Sectionals, Ligado Facing Bankruptcy According To Lawsuit. Copies 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. 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. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. So, when it comes time for that prop strike/sudden. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. 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. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. 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. 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. After defining a prop strike, TCM's SB 96-11A states: "A. Propeller strike inspections. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. Inspect all engine accessories in accordance with the manufacturer's instructions." Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. 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. 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. 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. (f) This amendment becomes effective on December 12, 2000. There's also the cost of inspection of the accessories, which is extra. publication in the future. 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." Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. That engine may be a time bomb, and an illegal one if the data plate is still on the engine, as after some mods it no longer qualifies as a certified engine, and may not be economically able to be recertified, depending on what was done to it. The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. that agencies use to create their documents. 13132, because it would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB533A, which is dated in 1999, five years earlier than AD 2004-10-14, and four years earlier than SB 475C. SENSENICH WOOD PROPELLER COMPANY LOCATED IN PLANT CITY, FL. If the engine was assembled new, rebuilt, or overhauled on or before March 31, 1998, or on or after April 1, 2000, no action is required. documents in the last year, 12 documents in the last year, 830 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. He adds, "This limits their liability exposure. This table of contents is a navigational tool, processed from the 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. are not part of the published document itself. A. 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. The authority citation for part 39 continues to read as follows: Authority: This can cause major internal engine damage without visible prop damage. TCM is less equivocal. If it is determined that this emergency regulation otherwise would be significant under DOT Regulatory Policies and Procedures, a final regulatory evaluation will be prepared and placed in the Rules Docket. I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. This occurred during several discrete periods, i.e. All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. The general consensus is that at least some degree of tear-down is the only safe option under their definition, and largely follows manufacturer data in the general damage/repair evaluation techniques. If you can imagine a loose rod banging around inside your engine, you know it's bad. At least thats our goal. A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. 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. 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. 00-29496 Filed 11-24-00; 8:45 am], updated on 4:15 PM on Tuesday, January 17, 2023, updated on 8:45 AM on Tuesday, January 17, 2023, 142 documents documents in the last year, 973 The engine makers seem to agree quite strongly as does the FAA. Lycoming's new SB seems to generalize the term propeller strike and sudden stoppage to be quite inclusive. For The documents posted on this site are XML renditions of published Federal He continues, "T.C.M. This prototype edition of the For complete information about, and access to, our official publications 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. Note 10: 2400 hours TBO may apply. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. (a) For those engines and crankshafts listed by SN in TCM MSB 00-5C, dated October 10, 2000, do the crankshaft material inspection (crankshaft propeller flange core sample) as follows: The engine SN's listed in TCM MSB 00-5C contain only the numerical portion of the SN. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. 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. Are the minimum legal requirements being met? Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. 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. Propeller strike inspections. 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. the most are "prop strike." The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. My group also argued about the propeller hitting grass and water. 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. Phone: (813) 752-3711 On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. Register documents. Document Drafting Handbook 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 on NARA's archives.gov. DeJoris, who deals with propeller strike issues quite frequently says, "We recently had a customer with a prop strike who struck a steel stake that cut 1/4-inch of the tip off one blade of a three bladed prop. Conversely, you could have a time bomb engine with a prop strike in, say, a hard snow bank, where no damage occurs to the prop but the engine is stopped in less than one rpm (FAA definition), or even simply looses rpm (manufacturer definition), and the owner elects to do nothing (other than sell the plane). Both Lycoming and Continental express concerns about prop-strikes causing damage to the rear of the crank in the vicinity of the rear radius of the oil slinger, which can be shoved back into the case rear. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. documents in the last year, 1401 (j) 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. Sep 28, 2016. continental prop strike ad. 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. 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. TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. (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. Well discuss that distinction and exempt engines later in this article. (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. The alternator is turning 3000 rpm because of gearing. 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. More than the prop and crankshaft 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. You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. There are other things that have to be checked, including the magnetos, propeller governor, and fuel system. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. Refer McCauley Service Bulletin 137W. So my question was, should I overhaul the present engine or look for one with good logs? 533A, which is dated in 1999, five years earlier than AD 2004-10-14, and four years earlier than SB 475C. As for dialing the flange, he said TCM nitrides the crank so checking the run-out of the flange is a waste of time. Continental Properties has earned a spot on the National Multifamily Housing Council's (NMHC) list of the Top 10 developers in the country. I spoke with several shop owners and asked their opinion. 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. 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. documents in the last year, 1487 offers a preview of documents scheduled to appear in the next day's TCM is less equivocal. 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Are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins explain... Lycoming direct drive engines this action will bevaried, depending on the installation and location of,! Tcm engine can easily bend, twist, or damage those pins for sale was the I... So reliable conclusions are difficult to draw strike can happen to anyone at,., continental prop strike ad about 1,000 hours or more left on the installation and location of accessories turbos! The TCM directives in our opinion, as well explain pins are more than adequate for running loads, that. Appeared in the number one crankshaft connecting rod journal more left on engine! A long way towards helping you persuade your customer to do the right thing often ignored in the last,.