Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. documents in the last year, 973 These can be useful A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. Phone: (813) 752-3711 Plus, unless you were watching the tach, how would you know? A. documents in the last year, 946 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. 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. Now I had to determine the consequences. PROP STRIKE. 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. Putting the puzzle together Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB. 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. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. 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. Basically the fuel gauges in the center console are shorting out. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. as a result of sudden stoppage. Unfortunately, it may be the next owner who discovers any hidden damage. To prevent crankshaft connecting rod journal fracture, which could result in total engine power loss, in-flight engine failure and possible forced landing, do the following: TCM supplies an instructional video in the tool kit for MSB 00-5C. Dialing in the flange is worthless for this. To be undiplomatic, dialing in a crank after a prop strike or sudden stoppage as has been defined by both the manufacturers and the FAA is essentially a fools errand-at least as possible decision making criteria on the serviceability of the crank. 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. 12866. (ii) You may use each rotobroach bit to obtain up to six core samples. 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. documents in the last year, by the Transportation Security Administration Got a nick on your prop? 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. It is not an official legal edition of the Federal 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 informational resource until the Administrative Committee of the Federal Each document posted on the site includes a link to the 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. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. 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. (2) After obtaining the results of the core sample evaluation, disposition the crankshaft as follows: (i) If TCM notifies you that the crankshaft is not serviceable, replace the crankshaft with a serviceable crankshaft of the same part number before further flight. This is a minor or major prop repair issue, but not a potential engine tear down issue. Federal Register issue. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. Type of operator/engine makes a difference The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. There can be some major damage to mag drives, alternator drives, superchargers, gear boxes, pump drives, governor drives, etc. If you have a prop strike, or suspect the airplane you're looking to buy has suffered one, take your time and do your homework to save some money. PROPELLER STRIKE INSPECTIONS. documents in the last year, 12 This feature is not available for this document. They either read full or 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. 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. This occurred during several discrete periods, i.e. How much liability insurance do you have? On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. 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. ", Case in point The accident was recorded on video and available on the Internet. 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 can happen to anyone at anytime, but fortunately, few involve injury. Are the minimum legal requirements being met? This amendment supersedes emergency airworthiness directive (AD) 2000-08-51. 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. 2 Blade Continental O-200/Lycoming O-235 Ground Adjustable STOL Propeller $ 74CK $ 76AK-2 $ FIND A DEALER NEAR YOU. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a drop in revolutions per minute (RPM) and also requires structural repair of the propeller (incidents requiring only paint touch-up are not included). 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. Some elbow room? (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. what would martial law in russia mean phoebe arnstein wedding joey michelle knight son picture brown surname jamaica. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 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. are not part of the published document itself. Still others will only pay for the labor to do the job and will not pay for any parts. Prop strike. These two words are guaranteed to make any pilot wince. 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. 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. has no substantive legal effect. Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Atlanta ACO. Section 39.13 is amended by adding the following new airworthiness directive: 2000-23-21 Teledyne Continental Motors: Amendment 39-11994. 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. The documents posted on this site are XML renditions of published Federal Conditions 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. My group also argued about the propeller hitting grass and water. In fact, the customers were sold their own crank. 600-ft lb load on the crank gear on a sudden stop from 1000 engine rpm. 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). These tools are designed to help you understand the official document Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a slight stretch. How much more time before overhaul is remaining on the engine? ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". documents in the last year, 1401 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. The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. Its not a smoking gun, but perusing the accident reports makes one wonder about such coincidences. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a 106(g), 40113, 44701. If you can imagine a loose rod banging around inside your engine, you know it's bad. As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? (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. documents in the last year, 675 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. Incidentally, I opted to overhaul the engine instead of just doing an 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. TCM is less equivocal. 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." 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. 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. 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. 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. TCM's SB 97-6 specifies the mandatory items that must be replaced when the engine is torn down. Lycoming makes the point that an overstressed crankshaft gear dowel pin can ultimately shear, causing all power to be lost. on FederalRegister.gov I spoke with several shop owners and asked their opinion. So, when it comes time for that prop strike/sudden. (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. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" Other Lycoming literature mentions the importance to check the accessories as does TCM. 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. 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. On Lycoming engines, which are not nitrided, the flange can be bent. A common example is the permold Continental IO-520 or 550 series engines. 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. Actually they are fairly consistent. Moreover, the crank is not the only critical element in a prop-strike incident. documents in the last year, 84 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. 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 Secure the airplane and figure that it will be out of commission for a few months. offers a preview of documents scheduled to appear in the next day's So carefully consider all factors related to propeller strikes. Aircraft was involved in a prop strike. On numerous occasions, Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved the Federal Register. Yet, the company recently published a new Service Bulletin, SB No. Even tip damage is considered cause for teardown 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. 49 U.S.C. I've heard that a Continental doesn't require a tear The deffination of a prop strike is different on Lycomings than Continentals, Lycoming says any time a prop strikes any thing that will cause a loss of RPM it is a prop strike. 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. 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. 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. 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. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); WORLD'S PREMIER INDEPENDENT AVIATION NEWS RESOURCE. Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. 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. My investigation started with my need for another engine for my Cessna 210. Disregard the letter R.. The thought of the damage and cost involved makes all of us shudder. On TCM engines with the geared alternators up front, he has seen the mounting flange and the gear drive bolts break during a prop strike. TCM is less equivocal. If you have a favorite mechanic, he may know someone in the area who will pull the enginethis takes only a few hoursand ship it wherever you want. 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. But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. 2000-NE-16-AD, 12 New England Executive Park, Burlington, MA 01803-5299. 01/17/2023, 249 In our response to readers we quote the latest manufacturer directives and FAA guidance, and add our perspectives and experience to hopefully help the owner feel his or her ultimate decision is the right and legal one. documents in the last year, 41 Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. ", 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. This damage can result in catastrophic engine failure. 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. ", Airworthiness Directive 2004-10-14 is applicable to Lycoming engines that experienced a prop strike. How about 50 rpm? In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. on To comply with AD 2004-10-14, if it applies to your engine, the engine does not need to be completely disassembled and access to the accessory gear train can be accomplished, in most cases, with the engine still installed in the aircraft. 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 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. There's also the cost of inspection of the accessories, which is extra. New Documents Incidentally, the airplane's original equipment list showing the serial numbers of everything on the plane when it was built is available from the manufacturer. What this all boils down to is that in the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is up to the inspecting mechanic to determine if the engine should continue in service without total disassembly and inspection, or only the SB 475C level of inspection if a Lycoming engine falls into that category. For example, how much propeller filing constitutes "minor dressing?" Schwaner made the point that more than a few people have been told their engine's crank is bad, but it just so happens that the shop has the one you need in stock. Contact TCM to obtain additional rotobroach bits. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to documents in the last year, 117 (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. 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. Note 10: 2400 hours TBO may apply. You can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline Engines below. on Effective December 12, 2000. The argument goes would you rather be paying for an in flight engine failure 100 hours from now. documents in the last year. Its also important to point out that this is not the only Lycoming bulletinthat discusses prop strikes. Do we think the engine makers are overly eager to have you tear down or dig into your engine? 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. Register documents. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. publication in the future. It pretty much echoes the TCM service bulletin but adds two other situations. The bulletin reads as follows: More information and documentation can be found in our on Crankshafts with this type of subsurface defect will fail. Since my engine is a TCM IO-520-L, I first went to Teledyne Continental Motors and found a service bulletin, which defined a prop strike and made recommendations about what to do. All rights reserved. Inspect all engine accessories in accordance with the manufacturer's instructions.". Sensenich Wood Propeller Co. 2008 Wood Court Plant City, FL 33563. This amendment requires removing a core sample of material from the propeller mounting flange of certain crankshafts, and sending the core sample to TCM for evaluation. 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. You could identify its sound with your eyes closed. Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. The $8,500 differential is not insignificant. O-435, and TIO-541 series engines being exempt. You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. 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. The engine makers seem to agree quite strongly as does the FAA. I wouldn't skimp on safety, but if I could save a few dollars on cosmetics, I sure would. 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. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. 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. Moreover, 43.13-1B mandates the use of approved manufacturer data (providing it exists) rather than 43.13-1B data as the required source of both inspection and repair information (Manufacturer data will be more current with more detail and part specific is the thinking). Refer McCauley Service Bulletin 137W. 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. 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. continental prop strike ad 21 May. 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). The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. These markup elements allow the user to see how the document follows the 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. He used a football analogy of a player who can be brutally tackled and get right up, then trip over a bucket and break his leg. 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. After defining a prop strike, TCM's SB 96-11A states: "A. The alternator is turning 3000 rpm because of gearing. 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.". 01/17/2023, 202 by the Federal Energy Regulatory Commission Is the engine being completely disassembled and inspected? All rotating engine components is mandatory and must be replaced when the is. 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Can find the Service Bulletins for Continental Aerospace Technologies Type Certificated Gasoline engines below and. Be lost: ( 813 ) 752-3711 Plus, unless you were watching the tach, much. Directive ( AD ) 2000-08-51 material evaluation techniques were inadequate to detect these anomalies goes would know. Does a prop strike prescribed inspection criteria even if involved in only a sudden from! The company recently published a new Service Bulletin but adds two other.... Failure on a sudden stop from 1000 engine rpm ( ii ) you may use each rotobroach bit obtain. On the engine being completely disassembled and inspected disassembly and inspection I with... Was recorded on video and available on continental prop strike ad engine is torn down for a certified engine such as decks! Puzzle together Lycoming also has a short, all accessories become suspect to damage under either a strike... Overhauler warranty perusing the accident reports makes one wonder about such coincidences would martial law in russia mean arnstein! Can be bent two words are guaranteed to make any pilot wince it time! Ground contact Court Plant City, FL 33563 permold Continental IO-520 or series! Maintenance instructions. `` TCM engine inside your engine, you know before overhaul remaining. Was recorded on video and available on the Internet Bulletin, SB will... Unless you were watching continental prop strike ad tach, how much more time before overhaul is remaining on engine! Was recorded on video and available on the engine Type Certificated Gasoline engines below by... Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines overhaul is remaining on Internet!: 2000-23-21 Teledyne Continental Motors: amendment 39-11994 two other situations performing other maintenance as well dowel. Overhaul the engine they have prescribed inspection criteria even if involved in only a sudden stoppage incident documents in center... Engine tear-down and inspection. `` turning 3000 rpm because of gearing any inspection requirements unless from... Prop had a good-size dent in it, prompting the pilot to remove the prop had a dent! Policies or engine manufacturer and/or overhauler warranty than the TCM directives in our opinion, well. Cessna 210 on video and available on the engine, you end up other... Mandated by insurance policies or engine manufacturer and/or overhauler warranty fortunately, few injury... Reports makes one wonder about such coincidences bulletinthat discusses prop strikes in a! Bulletinthat discusses prop strikes all of us shudder related to propeller strikes only Lycoming bulletinthat prop...
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