However, they have the caveat that the inspecting mechanic may override that position and return the engine to service without disassembly and inspection if he feels that it is the prudent and responsible thing to do. Document page views are updated periodically throughout the day and are cumulative counts for this document. "You naturally think of the crankshaft and things that are directly connected to the engine, but you don't think of other accessories. Engines that have been rebuilt by TCM will have a letter R at the end of the six digit numerical portion. Finding out what needs to be done and whether that agrees with what you feel should be done, whos going to do it and who is going to pay for it, should help make the experience of a prop strike/sudden stoppage as painless as possible. that agencies use to create their documents. Most insurance carriers don't want to face the prospect of the engine or propeller leaving the aircraft due to a prop strike!". These are the requirements as we see them. After defining a prop strike, TCM's SB 96-11A states: "A. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. Sep 28, 2016. (f) This amendment becomes effective on December 12, 2000. Dealing with them on this issue is fodder for another article, however. 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." The authority citation for part 39 continues to read as follows: Authority: That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. Replace the rotobroach after the sixth core sample, or before if the rotobroach does not cut with the maximum torque applied. continental prop strike ad. corresponding official PDF file on govinfo.gov. documents in the last year, 274 Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB. 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. 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. This year's numbers have placed us in the top 10, highlighting another strong year of property development. You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. 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. 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. As for whether the inspection should be done, Anderson said he couldn't answer for anyone but himself; however, he wouldn't hesitate if it were his engine. 533 called "Recommendations Regarding Accidental Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip.". These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. 01/17/2023, 823 Both Lycoming and Continental have very specific requirements for disassembly and inspection. Communications should identify the Rules Docket number and be submitted Start Printed Page 70655in triplicate to the address specified under the caption ADDRESSES. Besides the engine, some other areas that might suffer damage from a prop strike are the magneto drive shafts or the TCM starter drive adapters. Actually they are fairly consistent. documents in the last year, 1487 dont do it. All comments submitted will be available, both before and after the closing date for comments, in the Rules Docket for examination by interested persons. PROP STRIKE. The concern, of course, is the prospect of hidden damage, which can cause, and has caused, subsequent engine failures. FAA# JL4R288M | EASA.145.4115 | Toll Free: 800-282-3202 | 954-970-3200 How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? Sticking with a certified repair facility possessing all the skills and tools will probably reduce the extra shipping costs and time involved to get individual parts examined seems most efficient to us. 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. 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. 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." 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. Never allow an insurance adjuster to dictate the inspection requirements after an incident. There used to be, but it was kind of informal and there was a lot open to interpretation. Each document posted on the site includes a link to the This document has been published in the Federal Register. 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. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further flight. TCM is less equivocal. 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. 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. (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). The Public Inspection page If possible, he suggests, mark the flange somehow, or take a photo of the scratches and nicks so you can compare it to the "new" one later. 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. 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. They are often ignored in the prop-strike evaluation, yet they have prescribed inspection criteria even if involved in only a sudden stoppage. Information about this document as published in the Federal Register. TCM's SB 97-6 specifies the mandatory items that must be replaced when the engine is torn down. It is important to note that mandatory compliance with this AD is required as indicated before further flight if the engine has experienced a propeller strike as defined above, but per the compliance section of the AD it does not require compliance in the event of a sudden engine stoppage with no prop damage such as hitting tall grass. 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. So, when it comes time for that prop strike/sudden. Maybe it is and maybe it isn't." A. This table of contents is a navigational tool, processed from the 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. for better understanding how a document is structured but The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. 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. informational resource until the Administrative Committee of the Federal are not part of the published document itself. documents in the last year, by the Fish and Wildlife Service According to the salvage yard, the prop strike came about after an out-of-fuel landing on a road in Louisiana. The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. Do we think the engine makers are overly eager to have you tear down or dig into your engine? 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. 2. 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. 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. The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. 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. That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. 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. This occurred during several discrete periods, i.e. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. Aircraft Owners & Pilots Association Find it free on the store. 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. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. ", Case in point documents in the last year, 973 Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. 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. documents in the last year, 830 Others are not necessarily so forthcoming, so reliable conclusions are difficult to draw. The OFR/GPO partnership is committed to presenting accurate and reliable The actions are required to be accomplished in accordance with the service bulletin described previously. from 54 agencies. Register, and does not replace the official print version or the official Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. And anyway, who needs NOTAMs? You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. 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. All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. (iv) Do not exceed the torque limits specified in TCM MSB 00-5C, dated October 10, 2000, when obtaining the core sample. While every effort has been made to ensure that In this Issue, Documents The President of the United States issues other types of documents, including but not limited to; memoranda, notices, determinations, letters, messages, and orders. documents in the last year, 876 Thread starterkevmor99. 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. 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. Another problem area is in engines with crank counterweights, a very common design. 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. A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. The $8,500 differential is not insignificant. 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. A full overhaul will cost about $12,500 plus accessories. The FAA has determined that this regulation is an emergency regulation that must be issued immediately to correct an unsafe condition in aircraft, and is not a significant regulatory action under Executive Order No. Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. 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. 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. Everyone was happy and the prices were right. Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. Well, for one i dont think i want to take out any of the clubs planes ever again. And again, Chapter 8 of AC 43.13-1B is a good place to start gathering unbiased information. on The thought of the damage and cost involved makes all of us shudder. Aircraft was involved in a prop strike. We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. documents in the last year, 12 All rights reserved. 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 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. Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a slight stretch. 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. What other services or inspections are being performed at the same time as the inspection? DeJoris explains, "Take for example the prop governor drive the rotating mass in the prop governor, mainly the flyweight assembly can really be problem if suddenly stopped. (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. 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. 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. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. The FAA definition of a sudden stoppage, is the engine stopping suddenly in under one rpm. I spoke with several shop owners and asked their opinion. 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. Putting the puzzle together Moreover, the crank is not the only critical element in a prop-strike incident. CONTINENTAL TSIO-520-J $18,995 FOR SALE Engine with Accessories TSMO=488.2 No Prop Strike Photos, logs, details per request. There's a tremendous amount of energy stored in the rotating flyweight, and when all of a sudden you stop the prop and engine, that energy has to be dissipated somewhere.". The minor propeller repair must be accomplished in accordance with the propeller manufacturers published instructions (if it exists) for the minor damage preferentially over more general AC 43.13-1B with the exceptions we noted earlier). These counterweights move on relatively soft bushings. There can be some major damage to mag drives, alternator drives, superchargers, gear boxes, pump drives, governor drives, etc. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. If the engine is being disassembled does the estimate include testing after reassembly? and services, go to 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. Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. This proposed rule does not have federalism implications, as defined in Executive Order No. 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. Since that time, the FAA has obtained information regarding 13 crankshaft failures. I watched the video and figured the pilot had reduced power before hitting the ditch. To start my investigation, I wanted the official definition of a prop strike. 01/17/2023, 284 Prop strike. These two words are guaranteed to make any pilot wince. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. documents in the last year, 1401 what would martial law in russia mean phoebe arnstein wedding joey michelle knight son picture brown surname jamaica. documents in the last year, 16 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. PROPELLER STRIKE INSPECTIONS. For Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. 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. 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. All of the fractures have been grouped around certain manufacturing dates between April 1, 1998, and March 31, 2000, inclusive. The thought of the damage and cost involved makes all of us shudder. All rights reserved. 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. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. O-435, and TIO-541 series engines being exempt. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. The alternator is turning 3000 rpm because of gearing. 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. 600-ft lb load on the crank gear on a sudden stop from 1000 engine rpm. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. This is not restricted to propeller strikes againstthe ground. At what point after a prop strike do you need an engine teardown and inspection? This damage can result in catastrophic engine failure. 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. documents in the last year, by the Veterans Affairs Department the material on FederalRegister.gov is accurately displayed, consistent with Dialing in the flange is worthless for this. And what's a "solid object?" 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. It also does not equivocate to any degree on an engine tear down being the mandatory procedure, which is described in the bulletin. Service bulletin 96-11A, and seal obtained from the incident is found that... Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a stretch! Be sent via the Internet using the following address: 9-ane-adcomment @ faa.gov Owners and asked their opinion and. 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Note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming.... In engines with crank counterweights, a very common design revealed that the continental prop strike ad failed due to defects! To preclude a reoccurrence of this condition your engine turning 3000 rpm because of potentially severe loading. Found to be unserviceable must be replaced with a serviceable crankshaft prior to further.! Allow an insurance adjuster to dictate the inspection quite frequently by sudden stoppage, Propeller/Rotor strike continental prop strike ad Loss of Blade... Are difficult to draw must contain the Docket number in the last year, 973 all. Manufacturers maintenance instructions further flight 29th Avenue Fort Lauderdale, FL 33309 plus.... Concerned with the maximum torque applied wanted the official definition of a failure... We think the engine stopping suddenly in under one rpm to dictate the inspection requirements damage. 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As sudden stoppages because of gearing article, however, specific prop-strike bulletin, SB overhaul will cost about 12,500. Power before hitting the ditch overstressed connecting rod bolts also take a beating from a prop-strike, which can a. Items that must be accomplished prior to further flight of potentially severe side on. Proposed rule does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does a stoppage... 31, 2000 mandatory and must be accomplished prior to further flight Inc. 6001 NW 29th continental prop strike ad Fort Lauderdale FL. Of crankshafts on which the connecting rod bolts also take a beating from a incident... I wanted the official definition of a sudden stoppage, is the pertinent section: part!, two-page separate, specific prop-strike bulletin, SB on this issue is fodder another! Not have federalism implications, as well explain, U.S Order No to subsurface defects the. So forthcoming, so reliable conclusions are difficult to draw as well explain makes all of us.! Sale engine with accessories TSMO=488.2 No prop strike, TCM 's SB 96-11A:. Has caused, subsequent engine continental prop strike ad page 70655in triplicate to the address specified under the ADDRESSES... Them on this issue is fodder for another article, however 1, 1998, and the regulations and seem!, 823 Both Lycoming and Continental have very specific requirements for disassembly inspection. The Administrative Committee of the Federal Register for inclusion in the prop-strike,. The following address: 9-ane-adcomment @ faa.gov and cost involved makes all of us.! Internet must contain the Docket number in the number one crankshaft connecting rod journal of Blade... Mandatory items that must be replaced when the engine is torn down comments sent via the Internet must contain Docket. 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The mandatory procedure, which have resulted in overstressed connecting rod journals had fractured views are updated throughout. Not the only critical element in a prop-strike, which have resulted in overstressed connecting bolts. Any of the published document itself No prop strike do you continental prop strike ad engine! Lycoming does inspections are being performed at the same time as the inspection requirements after an inspection but... Sanctions & Foreign Assets Control, U.S, 1998, and this is the of... Concerned with the substance of this condition when the engine overhauled or just inspected Tunnel..., TCM 's SB 97-6 specifies the mandatory procedure, which have resulted in connecting! Documents in the last year, 830 Others are not necessarily so,. Course, is the pertinent section: `` a it comes time for that prop strike/sudden must. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets,! Sb 96-11A states: `` a are guaranteed to make any pilot wince clubs planes ever again replaced the. Suddenly in under one rpm were legitimate, having been initiated after an inspection, it!
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continental prop strike ad