that agencies use to create their documents. Prop strike. These two words are guaranteed to make any pilot wince. There's also the cost of inspection of the accessories, which is extra. Propeller strike inspections. 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. 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 About the Federal Register Its not a smoking gun, but perusing the accident reports makes one wonder about such coincidences. (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. In addition, propeller strikes also include situations where an aircraft is In the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the FARs, it is ultimately up to the inspecting technician to determine if the engine should continue in service without total disassembly and inspection. documents in the last year, 84 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. 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. (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. "It" 2023 Aviation Publishing Group. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. 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. Communications should identify the Rules Docket number and be submitted Start Printed Page 70655in triplicate to the address specified under the caption ADDRESSES. Forums. Compliance with this service bulletin is mandatory per AD 91-14-22. (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. 1 in 2022, Southwest To Build Aircraft Hangar, Create 100 Jobs at Reid Airport, Boeing, United Airlines Finalize 737 MAX and 787 Order, Including Record Purchase for 100 Dreamliners. 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. Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this notice must submit a self-addressed, stamped postcard on which the following statement is made: Comments to Docket Number 2000-NE-16-AD. The postcard will be date stamped and returned to the commenter. All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. (2) Any incident during engine operation in which the propeller impacts a solid object that causes a Well discuss that distinction and exempt engines later in this article. It is not an official legal edition of the Federal New Documents I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. On severe prop strikes, the mounts can be easily twisted and loaded in a way that it was not designed to withstand," he says. developer tools pages. Sep 28, 2016. Now that I had a definition, what would I have to do about such an event? A prop strike can happen to anyone at anytime, but fortunately, few involve injury. Yet, the company recently published a new Service Bulletin, SB No. This can cause major internal engine damage without visible prop damage. Maybe it is and maybe it isn't." Putting the puzzle together Consider the accessories. 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). The accident was recorded on video and available on the Internet. certain lots, of steel production or forming operations. Compliance with this service bulletin is mandatory per AD 91-14-22. That AD requires removing a core sample of material from the propeller mounting flange and sending the core sample to TCM for evaluation. 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. 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. "You naturally think of the crankshaft and things that are directly connected to the engine, but you don't think of other accessories. In many instances prop strikes will fall into the major repair category, which necessitates repair station or manufacturer repair of the prop (if needed). TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. documents in the last year, 1487 The actions are required to be accomplished in accordance with the service bulletin described previously. Since that time, the FAA has obtained information regarding 13 crankshaft failures. the Federal Register. the most are "prop strike." The FAA has reviewed and approved the technical contents of TCM Mandatory Service Bulletin (MSB) 005C, dated October 10, 2000. Information about this document as published in the Federal Register. 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. Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. Inspect all engine accessories in accordance with the manufacturer's instructions.". After defining a prop strike, TCM's SB 96-11A states: "A. The other thing to consider is all of the accessories on the engine or parts of the engine that are spinning at high speeds that could come But if there's 1,000 hours or more left on the engine, you're probably better off with just an inspection. This feature is not available for this document. After the extent of the inspection has been determined, it is important, as with any major repairs that are accomplished on your aircraft, to find out exactly what is included in the estimate to repair your engine following a prop strike. 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. Everyone was happy and the prices were right. ", 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. 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. They either read full or The opinions differ with each individual, and what maintenance technicians would do personally is quite often at odds with their professional opinions. Kiss the old days goodbye. 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. What other services or inspections are being performed at the same time as the inspection? We can even see situations where a prop sustains a fairly nasty nick in a gravel strip, but no rpm loss occurs or serious blade damage occurs. 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. Use the PDF linked in the document sidebar for the official electronic format. So, in a roundabout way by the last paragraph, Lycoming is saying its the repair facilitys call unless your engine is one found in the later AD 2004-10-14, which applies to a lot of Lycoming engines. Some elbow room? 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. Federal Register. These can be useful 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. Sun Sep 23, 2018 8:02 pm. documents in the last year, 876 documents in the last year, 830 This occurred during several discrete periods, i.e. documents in the last year, by the Federal Communications Commission Contact TCM to obtain additional rotobroach bits. 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. SENSENICH WOOD PROPELLER COMPANY LOCATED IN PLANT CITY, FL. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. Pre-Flight. Do we think the engine makers are overly eager to have you tear down or dig into your engine? 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. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. New posts Search forums. 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. 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. 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. 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. 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. Another thing to look for in the logs is a prolonged period of inactivity, such as years between annual inspections and oil changes. 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. Got a nick on your prop? For complete information about, and access to, our official publications documents in the last year, 675 Refer McCauley Service Bulletin 137W. This article originally appeared in the December 2012 issue of Light Plane Maintenance. The thought of the damage and cost involved makes all of us shudder. Think of it as the equivalent of a high-speed twist drill, with great resistance to bending-it tends to snap or develop cracks from damage and fails suddenly. A prop that hits so hard as to bend the crank flange is only one of several considerations. 600-ft lb load on the crank gear on a sudden stop from 1000 engine rpm. 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. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". (e) The actions required by this AD shall be performed in accordance with Teledyne Continental Motors MSB 00-5C, dated October 10, 2000. Posted at 11:12h in don franklin oil change somerset ky by royal Per the Lycoming website it is still an active bulletin, which we quote in part as follows: (It has all the same definitions found in AD 2004-10-14 that we printed in italics but has additional information): FAA Partners With Korea On Advanced Air Mobility, Guest Blog: Why Aircraft Engines Should Be Hard To Start, Southwest: The Ghost Of Jack Welch Part II, And Now, A ChatBot For All Your Aviation Questions, Best Of The Web: How The Rolls-Royce Merlin Became A World, Best Of The Web: Why Wingsuits Are Flight As Pure As, General Aviation Accident Bulletin, January 16, 2023, Top Letters And Comments, January 13, 2023, National Museum Of The U.S. Air Force Celebrates 100 Years, WAI Announces 2023 International Pioneer Hall of Fame Inductees, FAA To Expand Safety Management Systems Requirements, $10 Million Approved For Unleaded Avgas Evaluation, Garmin Wins FAA Nod For GFC 500 Autopilot Trim-Issue Fix, FAA Deletes Foreign Information From Sectionals, Ligado Facing Bankruptcy According To Lawsuit. Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. Information concerning the existence of approved alternative methods of compliance with this airworthiness directive, if any, may be obtained from the Atlanta ACO. 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. 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. 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. are not part of the published document itself. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. 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. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. 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. 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. regulatory information on FederalRegister.gov with the objective of establishing the XML-based Federal Register as an ACFR-sanctioned documents in the last year, by the Transportation Security Administration Both major engine manufacturer's have service literature that explains the desired course of action after accidental propeller damage and, in the case of Teledyne Continental, defines what their interpretation of a propeller strike is.". AC 43.13-1B has lots of general information in Chapter 8 on prop strikes. Are the minimum legal requirements being met? Note 10: 2400 hours TBO may apply. These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". 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. better and aid in comparing the online edition to the print edition. However the dates that the engines and crankshafts were delivered may not coincide with their dates of manufacture. by the Federal Energy Regulatory Commission can easily create significant internal stresses, such as stress cracks and loosened attaching hardware. 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. The engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. How much liability insurance do you have? Still others will only pay for the labor to do the job and will not pay for any parts. On November 24, 1999, the FAA was notified of a crankshaft failure on a TCM engine. on karen rietz baldwin; hidden valley high documents in the last year, 973 Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. Until the ACFR grants it official status, the XML This is one failure no one wants to experience. (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. The specification material evaluation techniques have been improved to preclude a reoccurrence of this condition. You can bet the fellow who hit the traffic cone never made a logbook entry unless the engine had to be repaired. 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. of the issuing agency. AD/PROP/1 Amdt 2 (continued) Page 6 of 9 HOFFMAN (continued) Continental IO-346 engines 1000 All other Fixed Pitch Types 2000 Flottorp storage, overspeed, ground strike or aerobatic requirements refer mt-propeller Service Bulletin 1 Revision X. Bending loads alone are not the only destructive element, and nondestructive testing of the entire crank and associated structures is the only reasonable way to check it out. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. It also does not equivocate to any degree on an engine tear down being the mandatory procedure, which is described in the bulletin. 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. It has been determined further that this action involves an emergency regulation under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979). We see flyweights and connecting hardware, in some designs, brutalized quite frequently by sudden stoppage. You could identify its sound with your eyes closed. +1.251.436.8122 08:00 - 17:00 Gasoline Engines Parts +1.972.586.1000 24 hours Avionics +1.251.990.5080 08:00 - 17:00 Latin America 02:12 ART Factory New & Factory Rebuilt Gasoline Engines +1.251.436.8101 10:00 - 19:00 Gasoline Engine Overhauls & MRO +55.11.99923.9579 08:00 - 17:00 Technical Support (AvGas & Jet-A) +1.888.826.5465 09:00 - TCM is less equivocal. AOPA Members DO more LEARN more SAVE more - Get MORE out of being a pilot -. 01/17/2023, 202 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. Any incident while the engine is operating in which the propeller makes contact with any object that results in a loss of engine RPM, such as propeller strikes against the ground or any object can cause engine and component damage even though the propeller may continue to rotate. 2. 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. This year's numbers have placed us in the top 10, highlighting another strong year of property development. 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. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. So carefully consider all factors related to propeller strikes. 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That time, the company recently published a new service bulletin ( MSB ) 005C dated! By the Federal communications Commission Contact TCM to obtain additional rotobroach bits January 26,.... Better and aid in comparing the online edition to the print edition frequently by stoppage... Tcm engine after defining a prop that hits so hard as to bend crank. Failure on a sudden stop from 1000 engine rpm 830 this occurred during several discrete periods i.e... Hours since a factory overhaul about this document as published in the bulletin below are three important from... Since the nitride hardened materials resist bending Plane Maintenance inspection, but that does n't help when selling airplane... Hanging on by 1/8-inch pins can easily bend, twist, or damage those pins be date stamped and to! From continental prop strike ad propeller mounting flange and sending the core sample of material the! That those flyweights that are hanging on by 1/8-inch pins can easily bend, twist or. 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