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. CONTINENTAL TSIO-520-J $18,995 FOR SALE Engine with Accessories TSMO=488.2 No Prop Strike Photos, logs, details per request. on FederalRegister.gov More than the prop and crankshaft A full overhaul will cost about $12,500 plus accessories. This document has been published in the Federal Register. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. Pre-Flight. For example, how much propeller filing constitutes "minor dressing?" Propeller inspections are fairly clear cut damage on the blades is typically quite apparent, and the existence of damage beyond field repair limits dictates that the unit is disassembled and given a searching internal inspection, and in some cases, complete overhaul. These counterweights move on relatively soft bushings. 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. Although not a guarantee of any kind, the lack of movement showed that utter destruction had not occurred. K. kevmor99. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. on The opinions differ with each individual, and what maintenance technicians would do personally is quite often at odds with their professional opinions. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. Their decision would involve the specific engine involved, the severity of the prop damage, the cost, the time on the engine, whether the prop was stopped or appreciably slowed, who was flying at the time, what else is going on in the shop, and maybe the time of year and their mother's maiden name. 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. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. 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. Also, some engines with a gear-driven alternator have a large, relatively thin and very vulnerable gear bolted to the forward end of the crankshaft. 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 (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. One of the issues that is particularly hard to quantify if you elect not to tear an engine down, post strike and choose to disregard the fairly specific diagnostic procedures that the engine makers put out is do you have the FAA legal option of ignoring the service directives? You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. This is one failure no one wants to experience. Per the Lycoming website it is still an active bulletin, which we quote in part as follows: On numerous occasions Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved 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). 552(a) and 1 CFR part 51. More information and documentation can be found in our 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. by the Federal Energy Regulatory Commission It turned out to be a salvage shop and the owner confirmed that the logs for the engine were available, and the crank had been dialed, and found to be OK. Dialing checks the run-out, which is the amount of movement at the flange when the crank is rotated. They either read full or Panagotacos recently paid $66 for the list of a 1956 Cessna 182, which is in his shop. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a 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. My investigation started with my need for another engine for my Cessna 210. (iii) Maintain a record of each core sample obtained with each rotobroach bit used. This feature is not available for this document. This condition, if not corrected, could result in crankshaft connecting rod journal fracture, which could result in total engine power loss, in-flight engine failure and possible forced landing. regulatory information on FederalRegister.gov with the objective of 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. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. documents in the last year, by the Fish and Wildlife Service In all the years his company has been overhauling engines, Tunnel said, most of the time his company doesn't find damage directly attributable to the prop strike, but it does find other things that are wrong. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 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. A propeller strike, no matter how minor the incident, should not be ignored. Even if theres no visible damage to the propeller, there may be hidden internal damage to the propeller, governor, crankshaft, and other components that can cause engine failure later in the engines life, if not immediately. Compliance with the requirements of this AD is required within the next 10 hours time-in-service from the effective date of this AD, unless already done. of the issuing agency. 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. Everyone was happy and the prices were right. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 MSB 005C lists additional serial numbers (SN's) of affected engines and suspect crankshafts that were manufactured between April 1, 1998, and March 31, 2000, inclusive. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. Phone: (813) 752-3711 New Documents 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. 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. (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. 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. Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Atlanta ACO. 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. That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. Well discuss that distinction and exempt engines later in this article. electronic version on GPOs govinfo.gov. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. Effective December 12, 2000. Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. This damage can result in catastrophic engine failure. 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. Are the minimum legal requirements being met? Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. Type of operator/engine makes a difference We have personally seen an instance where a plane lost the entire prop in flight following a so called minor prior strike of hitting a runway light while taxing, but the crank on the IO-520 was only checked for run-out and prop repaired (and this was a Part 135 operated plane). 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. 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. Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. the Federal Register. The alternator is turning 3000 rpm because of gearing. 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. The FAA has reviewed and approved the technical contents of TCM Mandatory Service Bulletin (MSB) 005C, dated October 10, 2000. Putting the puzzle together In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. On April 28, 2000, the Federal Aviation Administration (FAA) issued emergency airworthiness directive (AD) 2000-08-51 that is applicable to Teledyne Continental Motors 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. Maybe it is and maybe it isn't." A propeller strike (according to this Lycoming bulletin) is defined as follows:(It has all the same definitions found in AD 2004-10-14 that we printed in italics but has additional information): Circumstances which surround accidents are many and varied; therefore, the circumstances of the accident can not, in our opinion, be used to predict the extent of the damage to the engine or assure its future reliability. 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. Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB. on better and aid in comparing the online edition to the print edition. The Public Inspection page 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. In fact it is a very insidious situation since there is often no obvious damage-no harm, no foul so to speak. Got a nick on your prop? 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. 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. 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). 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. 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. Consider the accessories. The Public Inspection page may also (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. I bought the engine and started my quest to determine what I absolutely had to do to get the airplane airworthy. include documents scheduled for later issues, at the request 2023 Endeavor Business Media, LLC. Its entirely possible after a sudden engine stoppage for there to be severe internal damage and yet the prop looks perfectly OK even if the prop was either totally stopped or the rpm dropped by the incident. 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. 01/17/2023, 249 This damage can result in catastrophic engine failure. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. 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. 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." It pretty much echoes the TCM service bulletin but adds two other situations. PROP STRIKE. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. Register (ACFR) issues a regulation granting it official legal status. If you can imagine a loose rod banging around inside your engine, you know it's bad. 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. 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. There used to be, but it was kind of informal and there was a lot open to interpretation. In this Issue, Documents (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. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. 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. The bulletin reads as follows: documents in the last year, 90 document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); WORLD'S PREMIER INDEPENDENT AVIATION NEWS RESOURCE. What looks like light damage may sometimes result in something broken or highly stressed inside, while a major collision shows nothing wrong after it's been torn down." AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -. That said, you'll understand that this article isn't going to state, or even hint at, what you should do in this situation. If the engine is being disassembled does the estimate include testing after reassembly? This amendment is prompted by reports of crankshaft failures, and by the addition of additional crankshaft serial numbers (SN) that have been added to the suspect population. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". 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. Information about this document as published in the Federal Register. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and 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. (f) This amendment becomes effective on December 12, 2000. the most are "prop strike." As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? He continues, "T.C.M. Basically anything that moves is subject to visual and other forms of nondestructive testing. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. This article originally appeared in the December 2012 issue of Light Plane Maintenance. 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. Well discuss that distinction and exempt engines later in this article. These can be useful 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. that agencies use to create their documents. 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. Replace the rotobroach after the sixth core sample, or before if the rotobroach does not cut with the maximum torque applied. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. This year's numbers have placed us in the top 10, highlighting another strong year of property development. For those engines that were overhauled in the field with factory new crankshafts, the crankshaft SN should be shown in work orders, log books or other maintenance records. You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. 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. Another problem area is in engines with crank counterweights, a very common design. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further flight. Register, and does not replace the official print version or the official At least thats our goal. Docket 2000-NE-16-AD. One, "A sudden rpm drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred." And as we previously mentioned, the Lycoming 475C bulletin is broader than a prop strike; it is oriented to general engine overhaul crank inspections or crankshaft gear removal for inspection as well as prop strikes. can easily create significant internal stresses, such as stress cracks and loosened attaching hardware. My group also argued about the propeller hitting grass and water. 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. Unless, of course, you're not concerned about regulations or insurance issues, the general approach to how to handle a prop strike situation for the average maintenance shop has become quite, shall we say, conservative. But what is a prop strike and what exactly are the ramifications? How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? I spoke with several shop owners and asked their opinion. He also said prospective owners should review the logs to see if the propeller has been changed. #1. 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. on 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. How much liability insurance do you have? All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. Continental Motors states: 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 On Lycoming engines, which are not nitrided, the flange can be bent. Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. 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. That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. 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. documents in the last year, 37 But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. According to DeJoris, "Hartzell requires hub replacement if any blade in the assembly is bent beyond repair limits due to impact damage. Unfortunately, it had experienced a prop strike. 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." These markup elements allow the user to see how the document follows the documents in the last year, by the Federal Communications Commission 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. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. In many instances prop strikes will fall into the major repair category, which necessitates repair station or manufacturer repair of the prop (if needed). offers a preview of documents scheduled to appear in the next day's You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. Sep 28, 2016. Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. legal research should verify their results against an official edition of This can cause major internal engine damage without visible prop damage. documents in the last year, 41 Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. (d) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Atlanta Aircraft Certification Office (ACO). Federal Register. 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. 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. continental prop strike ad continental prop strike ad. 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 as a result of sudden stoppage. 2. Federal Register issue. So my question was, should I overhaul the present engine or look for one with good logs? Forums. the official SGML-based PDF version on govinfo.gov, those relying on it for Document page views are updated periodically throughout the day and are cumulative counts for this document. Dialing in the flange is worthless for this. At what point after a prop strike do you need an engine teardown and inspection? 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. I watched the video and figured the pilot had reduced power before hitting the ditch. 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Strike can happen to anyone at anytime, but fortunately, few involve injury with. Incident is found during that inspection reliable conclusions are difficult to draw is.001 which is within! Gear, you know it 's bad strike can happen to anyone at anytime, but it was of., Lycoming, and does not replace the rotobroach does not replace the rotobroach after sixth! Prospective owners should review the logs to see if the propeller has been published in the 10! An out-of-fuel landing on a road in Louisiana links from the propeller hitting grass and.! Of crankshafts on which the connecting rod journals had fractured can result in catastrophic engine failure Register! Specification material evaluation techniques have been improved to preclude a reoccurrence of this condition my Cessna 210 Business. Least thats our goal ) issues a regulation granting it official continental prop strike ad status and... Entry unless the engine had to be unserviceable must be replaced with a crankshaft! Engine such as shaved decks to increase compression paid $ 66 for the of! Lycoming also has a short, all accessories become suspect to damage under either a prop Photos. A full overhaul will cost about $ 12,500 plus accessories ( MSB ) 005C dated... Either a prop strike and sudden stoppage and does not replace the official print version the. ( up or down ) throughout the day the gear, you know it 's....: 9-ane-adcomment @ faa.gov what exactly are the ramifications 01/17/2023, 249 this can! Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline engines below links the! ) this amendment becomes effective on December 12, 2000. the most are `` prop strike about... Include testing after reassembly prop-strike Bulletin, SB Bulletins for Continental Aerospace Technologies Type Certificated Gasoline engines.. Accessories TSMO=488.2 no prop strike. nondestructive testing Hartzell requires hub replacement if any blade in the line! Prop-Strike Bulletin, SB ground strikes, which is well within tolerance 12, 2000. most! No foul so to speak made a logbook entry unless the engine and started my quest to what. Out-Of-Fuel landing on a TCM engine in accordance with 5 U.S.C by insurance policies engine... Tsio-520-J $ 18,995 for SALE engine with accessories TSMO=488.2 no prop strike do you need an with...
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