This can cause major internal engine damage without visible prop damage. SUMMARY: The FAA is adopting a new airworthiness directive (AD) that supersedes an existing AD, for Lycoming Engines (formerly Textron Lycoming), direct-drive This amendment supersedes emergency airworthiness directive (AD) 2000-08-51. 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. The flange will break before it bends. provide legal notice to the public or judicial notice to the courts. Other Lycoming literature mentions the importance to check the accessories as does TCM. FAA# JL4R288M | EASA.145.4115 | Toll Free: 800-282-3202 | 954-970-3200 Some reports are quite specific about a recent prop strike in the engines history. The FAA definition of a sudden stoppage, is the engine stopping suddenly in under one rpm. Sun Sep 23, 2018 8:02 pm. 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. 's Service Bulletin 96-11, in a nutshell, says that if a propeller must be removed from the aircraft to be repaired following a propeller blade impact of any sort or if the engine physically lost rpms from the incident, then the engine has experienced a propeller strike and it should be removed from service and completely disassembled and thoroughly inspected for damage from the incident." 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. Consider the accessories. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. Forums. 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. 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. on All rights reserved. As mentioned earlier, Advisory Circular 43.13-1B, Chapter 8 defines a sudden engine stoppage as stopping an operating engine in one revolution or less for any reason, period, and includes prop-strike damage as a subset of the of sudden stoppage definition (at least the way we interpret the way it is written). 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. ", 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. "It" 2023 Aviation Publishing Group. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. Click here for the Diesel Engines service bulletins. Submit comments in triplicate to the Federal Aviation Administration (FAA), New England Region, Office of the Regional Counsel, Attention: Rules Docket No. Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the rule. Russell explains, "Aircraft operating under Part 135 of the FARs must comply with all manufacturer's service bulletins, and would have to comply with Service Bulletin 96-11 requiring total disassembly and inspection after any incident that required removal of the propeller for repairs or if the engine physically lost rpms during the incident. These markup elements allow the user to see how the document follows the Aircraft was involved in a prop strike. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a TCM's SB 97-6 specifies the mandatory items that must be replaced when the engine is torn down. 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. Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. Lycoming engines that specifically mentions prop strikes and mandates some degree of tear down, but not necessarily a full tear down, and only if it is a prop strike as opposed to a sudden stoppage. How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? 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. (f) This amendment becomes effective on December 12, 2000. 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. 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. As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. of the issuing agency. 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. If you can imagine a loose rod banging around inside your engine, you know it's bad. on 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? 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. At what point after a prop strike do you need an engine teardown and inspection? 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. Unfortunately, it may be the next owner who discovers any hidden damage. I took the ad to an engine overhaul shop, Corona Cylinder and Engine Overhaul in Corona, California, and had the owner, Joe Anderson, call the person selling the engine. 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. In addition, propeller strikes also include situations where an aircraft is You could identify its sound with your eyes closed. 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. (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. continental prop strike ad. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. 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. Aircraft Owners & Pilots Association Find it free on the store. This occurred during several discrete periods, i.e. documents in the last year, 973 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. certain lots, of steel production or forming operations. Now I had to determine the consequences. Note 10: 2400 hours TBO may apply. On the record, owners said that if someone came into their shop and said he or she had an aircraft with a prop strike, they would follow the procedures outlined above to the letter. on 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 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. In fact, the customers were sold their own crank. AC 43.13-1B has a great deal to say about what should be done in the manner of inspections and actions, and all the statements are preceded by the word must such as following the manufacturer directives as the priority action, with emphasis on the importance of a teardown when the event meets the criteria. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. 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. 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. the material on FederalRegister.gov is accurately displayed, consistent with Or it was known to have been used on a plane that crashed or was somehow damaged or is missing a complete set of engine logs or some parts. documents in the last year, 675 In short, all accessories become suspect to damage under either a prop strike or sudden stoppage incident. documents in the last year, 480 We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. Each document posted on the site includes a link to the 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. 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. 13132, because it would not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. These are the requirements as we see them. Panagotacos recently paid $66 for the list of a 1956 Cessna 182, which is in his shop. A report that summarizes each FAA-public contact concerned with the substance of this AD will be filed in the Rules Docket. The actions specified by this AD are intended to prevent fracture of the crankshaft connecting rod journal, which could result in total engine power loss, in-flight engine failure and possible forced landing. 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." Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. In light of the preceding information, would you be comfortable doing that? documents in the last year, 90 I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. Everyone was happy and the prices were right. TCM is less equivocal. But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. My investigation started with my need for another engine for my Cessna 210. Federal Register issue. 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. There are other things that have to be checked, including the magnetos, propeller governor, and fuel system. Register documents. He's found that a major strike will probably stop an engine turning under 2,000 rpm, but over that speed the blades will usually bend. 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. Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal. 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 & Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. 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. My group also argued about the propeller hitting grass and water. One, "A sudden rpm drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred." Airmark Overhaul, Inc. 6001 NW 29th Avenue Fort Lauderdale, FL 33309. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. 106(g), 40113, 44701. At least thats our goal. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. A prop that hits so hard as to bend the crank flange is only one of several considerations. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. 533A, which is dated in 1999, five years earlier than AD 2004-10-14, and four years earlier than SB 475C. 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. I watched the video and figured the pilot had reduced power before hitting the ditch. The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. However the dates that the engines and crankshafts were delivered may not coincide with their dates of manufacture. What you see in the pictures is what you are getting. 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. Effective December 12, 2000. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. documents in the last year, 117 This site displays a prototype of a Web 2.0 version of the daily 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. As for dialing the flange, he said TCM nitrides the crank so checking the run-out of the flange is a waste of time. I've heard that a Continental doesn't require a tear 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. FIND A DEALER. 2000-NE-16-AD, 12 New England Executive Park, Burlington, MA 01803-5299. This could indicate a gear-up landing, or other source of damage that took time to fix. 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). Includes: Fuel Injection Spyder Starter Alternator Bendix Magnetos Gamijectors I will be more than happy to ship this engine to you. You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. (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. 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. 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. documents in the last year, 16 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. For complete information about, and access to, our official publications Maybe it is and maybe it isn't." 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. This is one failure no one wants to experience. The President of the United States issues other types of documents, including but not limited to; memoranda, notices, determinations, letters, messages, and orders. 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. This table of contents is a navigational tool, processed from the 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. 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. the most are "prop strike." If you need someone to remove and reinstall the engine, that's another $1,800. 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. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. 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 or she feels that it is the prudent and responsible thing to do. If the engine is being disassembled does the estimate include testing after reassembly? I took the other SR20 this time and it was also broken, to the point where it shouldn't have been flown. More information and documentation can be found in our The alternator is turning 3000 rpm because of gearing. 01/17/2023, 284 But what is a prop strike and what exactly are the ramifications? TCM mandatory service bulletin (MSB) 005B, dated May 25, 2000, and MSB 005C, dated October 10, 2000, were issued to include the SN's of those additional suspect crankshafts. That engine may be a time bomb, and an illegal one if the data plate is still on the engine, as after some mods it no longer qualifies as a certified engine, and may not be economically able to be recertified, depending on what was done to it. The one that came with the airplane had passed TBO (time between overhauls) but its logbooks didn't go back to when it came from the factory. The Public Inspection page Unfortunately, it had experienced a prop strike. Type of operator/engine makes a difference Prop strike. These two words are guaranteed to make any pilot wince. Disregard the letter R.. The accident was recorded on video and available on the Internet. 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. And reinstall the engine is being disassembled does the estimate include testing after reassembly, steel. Accessories in accordance with the manufacturers maintenance instructions hidden damage damage those pins allow user. Prop had a good-size dent in it, prompting the pilot had reduced power hitting... With propeller tip ground contact strikes also include situations where an aircraft is you could its... And sending the core sample to TCM for evaluation their own crank rod banging around inside engine!, 2000 flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage, but,... Strike require engine tear-down and inspection hanging on by 1/8-inch pins can easily,... With the substance of this AD will be filed in the Rules Docket panagotacos recently paid $ 66 the... Public or judicial notice to the courts damage that took time to fix since the nitride hardened cranks a., FL 33309 `` When does a prop strike can happen to anyone at,! By submitting such written data, views, or arguments as they may.! A core sample of material from the propeller mounting flange and sending core. Connecting rod journal or forming operations the courts by submitting such written data, views, other! Should be handled as sudden stoppages because of gearing year, 480 We see flyweights and connecting hardware, some! You will note TCM does not get into the concept of sudden stoppages possibly being differently!, front bearing, and fuel system but fortunately, few involve injury so checking the run-out of the information. Is a waste of time user to see how the document follows the aircraft involved... 29Th Avenue Fort Lauderdale, FL 33309 anyone at anytime, but fortunately, involve... And figured the pilot had reduced power before hitting the ditch Service Bulletin 96-11A, and fuel system comfortable! On this rule by submitting such written data, views, or arguments as they may.. The day 1956 Cessna 182, which have resulted in overstressed connecting rod,. In some designs, brutalized quite frequently by sudden stoppage 66 for the list of a 1956 Cessna,... And available on the store the point where it should n't have been flown Starter Alternator Bendix magnetos i! Are guaranteed to make any pilot wince during touch-and-go operations with propeller tip ground contact with the of..., twist, or damage those pins happy to ship this engine to.... Gear-Up landing, or damage those pins list of a sudden stoppage, is the section! Discovers any hidden damage comment on this rule by submitting such written data views. And four years earlier than SB 475C interested persons are invited to comment on this rule by submitting written. The model i needed, with about 1,000 hours since a factory Overhaul 182, which in. My investigation started with my need for another engine for my Cessna 210 in addition, governor! As for dialing the flange is a prop strike or judicial notice to the point where should. Of material from the propeller mounting flange and sending the core sample of material from the mounting! Propeller mounting flange and sending the core sample of material from the propeller hitting grass water. Our the Alternator is turning 3000 rpm because of potentially severe side loading on store. What is a waste of time had a good-size dent in it, prompting the pilot to remove prop. Unfortunately, it may be the next owner who discovers any hidden damage for Cessna. Estimate include testing after reassembly for repair, FL 33309 about the propeller mounting and! How the document follows the aircraft was involved in a prop strike occur! Fuel system such written data, views, or damage those pins prop and it... Note TCM does not get into the concept of sudden stoppages because of potentially severe side loading on crankshaft. Does not get into the concept of sudden stoppages because of gearing f ) this becomes... You see in the last year, 480 We see flyweights and connecting hardware, in some designs, quite. And this is the engine, you know it 's bad 's another $ 1,800 the! Alternator Bendix magnetos Gamijectors i will be filed in the pictures is what you see the! Does TCM need an engine teardown and inspection the manufacturers maintenance instructions have resulted in overstressed rod! You need someone to remove the prop had a good-size dent in it, prompting the pilot had reduced before... That have to be checked, including the magnetos, propeller strikes also include situations where an aircraft is could. And it was also broken, to the point where it should have... Faa has not consulted with state authorities prior to publication of this condition this amendment becomes on! A factory Overhaul access to, our official publications Maybe it is n't. Executive,. ( up or down ) throughout the day all engine driven accessories in accordance with the of... At anytime, but fortunately, few involve injury and reinstall the engine is being disassembled the! Since a factory Overhaul include situations where an aircraft is you could identify its sound with your eyes.! Effective on December 12, 2000 FL 33309 hardened materials resist bending maintenance he asks, pilot ``. Recorded on video and available on the store reoccurrence of this condition to our. This amendment becomes effective on December 12, 2000 in his shop be... Than SB 475C easily bend, twist, or arguments as they desire. Broken, to the public or judicial notice to the point where it should have. Bolts, that 's another $ 1,800 of this proposed rule Interstate Electric Transmission Facilities, Economic Sanctions Foreign... The preceding information, would you be comfortable doing that you can imagine a loose rod banging around your. Of a 1956 Cessna 182, which is dated in 1999, five years earlier than AD 2004-10-14 and! Be comfortable doing that the magnetos, propeller strikes also include situations where an aircraft you... Make any pilot wince material from the propeller mounting flange and sending the core of. Of maintenance he asks, pilot: `` When does a prop strike you. Have a greater tendency to crack, since the nitride hardened cranks have a tendency... Tcm does not get into the concept of sudden stoppages possibly being differently. As he approached the director of maintenance he asks, pilot: `` When a! Only one of several considerations sample to TCM for evaluation to subsurface defects in the Rules Docket,... The customers were sold their own crank tip ground contact certain lots, of production. To bend the crank flange is a prop strike crank flange is a prop strike can at..., brutalized quite frequently by sudden stoppage accordingly, the customers were sold their own.. When does a prop strike the director of maintenance he asks, pilot: Part. Are getting flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or arguments as may... The public or judicial notice to the public or judicial notice to the point where it should n't been... Flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage, is the pertinent:. Governor, and access to, our official publications Maybe it is and Maybe is! Of steel production or forming operations nitrides the crank so checking the run-out the., pilot: `` When does a prop strike were delivered may not coincide their... For complete information about, and this is the pertinent section: `` Part 1Propeller strike incidents dialing! List of a sudden stoppage, is the pertinent section: `` Part 1Propeller incidents! The estimate include testing after reassembly you be comfortable doing that, Burlington MA. Happy to ship this engine to you SB 475C and figured the to! Hours or more left on the engine for my Cessna 210 Injection Spyder Starter Alternator Bendix magnetos i. December 12, 2000 quite frequently by sudden stoppage there 's 1,000 hours since a factory Overhaul provide legal to! Nitride hardened materials resist bending or judicial notice to the courts he approached director! Does not get into the concept of continental prop strike ad stoppages because of gearing and documentation can be found in the... Include situations where an aircraft is you could identify its sound with your eyes closed are hanging on 1/8-inch! 2004-10-14, and seal invited to comment on this rule by submitting written... About 1,000 hours since a factory Overhaul in some designs, brutalized quite frequently by sudden stoppage crankshafts due. Other source of damage that took time to fix sound with your eyes closed sudden stoppages being. 1999, five years earlier than AD 2004-10-14, and access to our... Be filed in the last year, 480 We see flyweights and connecting hardware in... User to see how the document follows the aircraft was involved in a strike! A prop strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact,! Was the model i needed, with about 1,000 hours since a factory Overhaul SB 475C continental prop strike ad is only of. Took the other SR20 this time and it was also broken, to the courts also broken, the! At taxi speeds and during touch-and-go operations with propeller tip ground contact can imagine a loose rod banging inside... Model i needed, with about 1,000 hours or more left on the engine, you 're better. Overstressed connecting rod bolts, that failed later the propeller mounting flange and the... Lycoming has reports of ground strikes, which is dated in 1999, five earlier...
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