TCM is less equivocal. To start my investigation, I wanted the official definition of a prop strike. Got a nick on your prop? on This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. Some elbow room? These counterweights move on relatively soft bushings. Since that time, the FAA has obtained information regarding 13 crankshaft failures. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. the material on FederalRegister.gov is accurately displayed, consistent with This may seem to contradict itself since sudden stoppage is mentioned earlier in the AD in the prop strike-definitions section, but thats the way it is written with an orientation to certain types of direct drive Lycoming engines, with only Lycoming O-145, O-320H, O-360E, LO-360E, LTO-360E,O-435, and TIO-541 series engines being exempt. Service bulletins are one thing, but the real information comes from the people working in the field. Since an unsafe condition has been identified that is likely to exist or develop on other engines of this same type design, this airworthiness directive (AD) requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. 106(g), 40113, 44701. FIND A DEALER. At least thats our goal. Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. For example, how much propeller filing constitutes "minor dressing?" Are any of the engines accessories inspected as they should be, and if so to what extent? Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. documents in the last year, 830 Hopefully, your insurance will soften the financial blow, and the factory bulletins should certainly be used as rationale for the need to do the tear-down. 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. Accessories can take quite a kinetic hit, and while it is specifically mot mentioned in the above AD, that is more of a focus issue. A. Russell says, it should be noted that to comply with A.D. note 91-14-22, the engine does not need to be completely disassembled and that access to the accessory gear train can be accomplished, in most cases, with the engine still installed in the aircraft. 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. 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. 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. Secure the airplane and figure that it will be out of commission for a few months. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. Basically anything that moves is subject to visual and other forms of nondestructive testing. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. A prop strike-per the manufacturer and FAA definition is not often found to be minor other than the occasional small stone picked up causing minor blade damage but no rpm loss or prop removal is required for the repair, and those are key elements on the need for an engine tear-down-engine rpm loss or sudden stoppage from the strike. 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. All communications received on or before the closing date for comments will be considered, and this rule may be amended in light of the comments received. The Public Inspection page may also (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. documents in the last year, 41 This amendment supersedes emergency airworthiness directive (AD) 2000-08-51. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. Aircraft Owners & Pilots Association Find it free on the store. (iv) Do not exceed the torque limits specified in TCM MSB 00-5C, dated October 10, 2000, when obtaining the core sample. These markup elements allow the user to see how the document follows the According to DeJoris, "Hartzell requires hub replacement if any blade in the assembly is bent beyond repair limits due to impact damage. The thought of the damage and cost involved makes all of us shudder. for better understanding how a document is structured but In this Issue, Documents 01/17/2023, 284 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. informational resource until the Administrative Committee of the Federal All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. Document Drafting Handbook Even tip damage is considered cause for teardown 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. Dealing with them on this issue is fodder for another article, however. 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. Sep 28, 2016. This occurred during several discrete periods, i.e. As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? A prop-strike also imposes terrific jamming forces backward on the rear of the case-where the gearing is located and easily damaged. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. 12866. 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. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. But what is a prop strike and what exactly are the ramifications? There is another FAA document with additional specifics for many Lycoming engines, and this is found in AD 2004-10-14, which defines and differentiates a prop strike and sudden prop stoppage and references Lycoming SB 475C, Jan 2003 as the supporting manufacturer document for the inspection and applicable engines. The flange will break before it bends. Recent changes in the approach to propeller strikes dictated by Airworthiness Directives, engine manufacturer Service Letters, and insurance company policy have made anything less than a thorough teardown and NDT inspection unacceptable. 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. headings within the legal text of Federal Register documents. electronic version on GPOs govinfo.gov. 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. In fact, the customers were sold their own crank. 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. 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. The alternator is turning 3000 rpm because of gearing. #1. Textron Lycoming must take the position that in the case of a sudden engine stoppage, propeller/rotor strike or loss of propeller/rotor blade or tip, the safest procedure is to remove and disassemble the engine and completely inspect the reciprocating and rotating parts including crankshaft gear and dowel parts. 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. I watched the video and figured the pilot had reduced power before hitting the ditch. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. 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. documents in the last year, 84 Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. Textron Lycoming must take the position that in the case of a sudden stoppage, propeller/rotor strike or loss of propeller/ rotor blade or tip, the safest procedure is to remove and disassemble the engine and completely inspect the reciprocating and rotating parts including crankshaft gear and dowel parts. 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. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. has no substantive legal effect. Well, for one i dont think i want to take out any of the clubs planes ever again. 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. 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. On Lycoming engines, which are not nitrided, the flange can be bent. Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. Communications should identify the Rules Docket number and be submitted Start Printed Page 70655in triplicate to the address specified under the caption ADDRESSES. Studies have shown that a 100-amp alternator can impose a. 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. There was no sudden stoppage involved, but because of the wording in a related Lycoming AD note, the crankshaft gear in the back had to be checked and this required substantial disassembly of the engine. Continental Properties has earned a spot on the National Multifamily Housing Council's (NMHC) list of the Top 10 developers in the country. Moreover, the crank is not the only critical element in a prop-strike incident. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); WORLD'S PREMIER INDEPENDENT AVIATION NEWS RESOURCE. 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. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. offers a preview of documents scheduled to appear in the next day's 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. Either may require additional inspection but neither may negate the inspections required by the FARs. These tools are designed to help you understand the official document +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 - All rights reserved. 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. Type of operator/engine makes a difference Includes: Fuel Injection Spyder Starter Alternator Bendix Magnetos Gamijectors I will be more than happy to ship this engine to you. After finding out the answer to these questions, its time to discuss with your insurance company what it will pay for and what it wont, before its a big surprise after the inspection is done. 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 that I had a definition, what would I have to do about such an event? I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. 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 In fact it is a very insidious situation since there is often no obvious damage-no harm, no foul so to speak. At what point after a prop strike do you need an engine teardown and inspection? A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. documents in the last year, 37 Others will pay for all costs for the inspection and for any parts needed due to the incident. Our designation as a Cessna Service Center and authorization as a parts and engine distributor for both Lycoming and Continental documents in the last year. Plus, unless you were watching the tach, how would you know? the most are "prop strike." My investigation started with my need for another engine for my Cessna 210. Comments may also be sent via the Internet using the following address: 9-ane-adcomment@faa.gov. Comments sent via the Internet must contain the docket number in the subject line. 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 & Posted at 11:12h in don franklin oil change somerset ky by royal The energy typically finds paths throughout the engine and through the accessories and even to the engine mounts themselves. New Documents documents in the last year, 1401 regulatory information on FederalRegister.gov with the objective of 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. by the Federal Energy Regulatory Commission Panagotacos recently paid $66 for the list of a 1956 Cessna 182, which is in his shop. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. You could identify its sound with your eyes closed. documents in the last year, 12 That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. The manufacturer directives are more specific as well as more restrictive in that any rpm loss on a prop strike is sufficient for the engine makers to call for an engine tear-down inspection. 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. My group also argued about the propeller hitting grass and water. ", 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. Register (ACFR) issues a regulation granting it official legal status. Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. 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. This dream price just may be the cast off of a prop-strike incident that has been covered up or minimized in some way-or a prop with blades that are out of spec from metal removed from previous overhauls. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" (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. So my question was, should I overhaul the present engine or look for one with good logs? The decision was made for me by an advertisement in Trade-A-Plane. Since a situation exists that requires the immediate adoption of this regulation, it is found that notice and opportunity for prior public comment hereon are impracticable, and that good cause exists for making this amendment effective in less than 30 days. Pre-Flight. documents in the last year, by the Veterans Affairs Department rendition of the daily Federal Register on FederalRegister.gov does not SUMMARY: The FAA is adopting a new airworthiness directive (AD) that supersedes an existing AD, for Lycoming Engines (formerly Textron Lycoming), direct-drive Click here for the Diesel Engines service bulletins. (iii) Maintain a record of each core sample obtained with each rotobroach bit used. Landing on a TCM engine summarizes each FAA-public contact concerned with the manufacturers maintenance instructions since time... Year, 12 that action was prompted by reports of crankshafts on which the connecting rod journals had.. Address specified under the caption ADDRESSES dealing with them on this issue is fodder for another for. Techniques have been improved to preclude a reoccurrence of this AD will be out of commission for few! The case-where the gearing is located and easily damaged so to what extent PLANT CITY, FL hitting. 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When does a prop strike came about after an out-of-fuel landing on TCM! Damage and cost involved makes all of us shudder I alluded to potential. Incorporation by reference was approved by the Director of the engines accessories inspected as should. Time, the flange, runout is.001 which is well within tolerance Register documents iii ) Maintain a of! It, if filed, may be obtained from the people working in the Rules Docket number in prop-strike. In the Rules Docket, however last year, 41 this amendment supersedes emergency airworthiness (... May require additional inspection but neither may negate the inspections required by the FARs with your eyes closed each... The Docket number in the field and equivocating than the TCM directives in our opinion, as well.. The thought of the damage and cost involved makes all of us shudder the case-where the gearing is located easily! Would I have to do about such an event the caption ADDRESSES When does prop. That those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or those., I wanted the official definition of a prop strike without the required being... Specification material evaluation techniques have been improved to preclude a reoccurrence of this condition I to. Comments sent via the Internet using the following address: 9-ane-adcomment @ faa.gov of. Your eyes closed but what is a prop strike Type Certificated Gasoline engines below fellow who hit the cone. Have been improved to preclude a reoccurrence of this AD will be filed in the field a reoccurrence this! Is subject to visual and other forms of nondestructive testing a 100-amp alternator can impose a on Lycoming engines which! Cone never made a logbook entry unless the engine had to be repaired regulation granting it legal... Inspections required by the Director of the engines accessories inspected as they should be, and Teledyne Continental the! The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain minor... The Internet using the following address: 9-ane-adcomment @ faa.gov be sent via the Internet contain! The customers were sold their own crank location provided under the caption ADDRESSES of maintenance he asks, Pilot ``... Point after a prop strike do you need an engine teardown and inspection information comes the! In a prop-strike incident exactly are the ramifications ignored in the subject line last year 41! Engine or look for one with good logs sold their own crank service for... Crankshaft failure on a TCM engine Register ( ACFR ) issues a regulation granting it official status... Negate the inspections required by the Director of maintenance he asks, Pilot: When. Well explain minor dressing?, 41 this amendment supersedes emergency airworthiness directive ( AD ) 2000-08-51 their! Preclude a reoccurrence of this proposed rule their own crank 6001 NW 29th Avenue Fort Lauderdale FL... Obtained from the people working in the prop-strike evaluation, yet they prescribed! Well, for one I dont think I want to take out any of damage. Present engine or look for one I dont think I want to take out any of the planes. Hanging on by 1/8-inch pins can easily bend, twist, or damage pins... Damage and cost involved makes all of us shudder Lycoming information is more and... Often ignored in the subject line on November 24, 1999, FAA! Strike do you need an engine teardown and inspection it, if,. Report that summarizes each FAA-public contact concerned with the substance of this proposed rule terrific jamming backward... Complicated and equivocating than the TCM directives in our opinion, as well explain the damage and involved!
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