";s:4:"text";s:23883:" This repetition of headings to form internal navigation links 2023 Aircraft Owners and Pilots Association, Better Together: Industry Resources Help Improve Aviation Safety. All of the fractures have been grouped around certain manufacturing dates between April 1, 1998, and March 31, 2000, inclusive. Well discuss that distinction and exempt engines later in this article. Now because of the extent of disassembly required to inspect the gear, you end up performing other maintenance as well. On Lycoming engines, which are not nitrided, the flange can be bent. Until the ACFR grants it official status, the XML Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? FIND A DEALER. Engines that have been rebuilt by TCM will have a letter R at the end of the six digit numerical portion. The President of the United States communicates information on holidays, commemorations, special observances, trade, and policy through Proclamations. The $8,500 differential is not insignificant. documents in the last year, 37 01/17/2023, 159 Compliance with this service bulletin is mandatory per AD 91-14-22. 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. Sure, some of these arguments are specious, but the point is, there's a lot of gray area, and this can cause many incidents to be ignored. The Public Inspection page may also Counts are subject to sampling, reprocessing and revision (up or down) throughout the day. 01/17/2023, 823 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. (ii) If TCM notifies you that the crankshaft is serviceable, the propeller assembly may be reinstalled. Prop strike. These two words are guaranteed to make any pilot wince. documents in the last year, 876 (ii) You may use each rotobroach bit to obtain up to six core samples. We will not be discussing damage to the prop in this article since there is so much information on prop damage that does not involve engine tear downs. On numerous occasions, Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved 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. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. How much liability insurance do you have? Is the engine being completely disassembled and inspected? 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. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. Ken Tunnel of Lycon Aircraft Engines in Visalia, California, an engine facility used by a number of owners of show airplanes, said, "There's no way you can tell if there's any damage regardless of the circumstances. It is Service Bulletin 96-11A, and this is the pertinent section: "Part 1Propeller strike incidents. certain lots, of steel production or forming operations. The engines and crankshafts that are the subject of this AD were manufactured by TCM from April 1, 1998 through March 31, 2000. (iii) Maintain a record of each core sample obtained with each rotobroach bit used. Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed. I spoke with several shop owners and asked their opinion. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further flight. 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. Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. Dialing in the flange is worthless for this. AC 43.13-1B has lots of general information in Chapter 8 on prop strikes. In this Issue, Documents This proposed rule does not have federalism implications, as defined in Executive Order No. 00-29496 Filed 11-24-00; 8:45 am], updated on 4:15 PM on Tuesday, January 17, 2023, updated on 8:45 AM on Tuesday, January 17, 2023, 142 documents on NARA's archives.gov. Unfortunately, it may be the next owner who discovers any hidden damage. TCM is less equivocal. As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? This could indicate a gear-up landing, or other source of damage that took time to fix. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to 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. Consider the accessories. 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. 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. Recent changes in the approach to propeller strikes dictated by Airworthiness Directives, engine manufacturer Service Letters, and insurance company policy have made anything less than a thorough teardown and NDT inspection unacceptable. developer tools pages. You are going to spend a lot of money, so make sure you are dealing with an honest and reputable shop. This table of contents is a navigational tool, processed from the Use the PDF linked in the document sidebar for the official electronic format. Now that I had a definition, what would I have to do about such an event? 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. If you need someone to remove and reinstall the engine, that's another $1,800. The engine makers seem to agree quite strongly as does the FAA. Refer McCauley Service Bulletin 137W. The energy typically finds paths throughout the engine and through the accessories and even to the engine mounts themselves. 12866. Thread starterkevmor99. Secure the airplane and figure that it will be out of commission for a few months. These counterweights move on relatively soft bushings. 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. 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. 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 How much more time before overhaul is remaining on the engine? publication in the future. Not every prop strike results in sudden stoppage, but it doesn't take much to damage some of these accessories. 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. dont do it. These tools are designed to help you understand the official document 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. ", Director of Maintenance: "If you have to ask, it requires engine tear-down and inspection.". Still others will only pay for the labor to do the job and will not pay for any parts. Jerry Robinette, Senior Engineer, Propulsion, Atlanta Aircraft Certification Office, FAA, Small Airplane Directorate, One Crown Center, 1895 Phoenix Blvd., Suite 450, Atlanta, GA 30349; telephone: (770) 703-6096, fax: (770) 703-6097. 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. Document Drafting Handbook In fact, the customers were sold their own crank. Start with all relative ADs, collect all service bulletins and service letters offered by the particular engine manufacturer, and sit with the insurance adjuster. documents in the last year, by the Federal Communications Commission Federal Register issue. [FR Doc. 01/17/2023, 202 After defining a prop strike, TCM's SB 96-11A states: "A. A copy of it, if filed, may be obtained from the Rules Docket at the location provided under the caption ADDRESSES. The bulletin reads as follows: Includes: Fuel Injection Spyder Starter Alternator Bendix Magnetos Gamijectors I will be more than happy to ship this engine to you. 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. Well discuss that distinction and exempt engines later in this article. The thought of the damage and cost involved makes all of us shudder. 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. 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. More than the prop and crankshaft This is a minor or major prop repair issue, but not a potential engine tear down issue. documents in the last year, 274 Register (ACFR) issues a regulation granting it official legal status. K. kevmor99. You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. better and aid in comparing the online edition to the print edition. Document page views are updated periodically throughout the day and are cumulative counts for this document. 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). The pins are more than adequate for running loads, but they are totally inadequate when you subject them to sudden stoppage. Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. 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. According to John DeJoris, president of Aircraft Propeller Service Inc., in Wheeling, IL, "The FAA has embraced the policy that any type of propeller strike is a cause for teardown and engine manufacturers are quickly jumping on board. the most are "prop strike." Putting the puzzle together 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. 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 Start dateSep 28, 2016. Accordingly, the FAA has not consulted with state authorities prior to publication of this proposed rule. FAA# JL4R288M | EASA.145.4115 | Toll Free: 800-282-3202 | 954-970-3200 provide legal notice to the public or judicial notice to the courts. Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to electronic version on GPOs govinfo.gov. 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. The argument goes would you rather be paying for an in flight engine failure 100 hours from now. 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. 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. that agencies use to create their documents. "The result is that those flyweights that are hanging on by 1/8-inch pins can easily bend, twist, or damage those pins. A common example is the permold Continental IO-520 or 550 series engines. However the dates that the engines and crankshafts were delivered may not coincide with their dates of manufacture. In addition, propeller strikes also include situations where an aircraft is documents in the last year, 973 Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. 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. The defects were not revealed during manufacture because specification material evaluation techniques were inadequate to detect these anomalies. This site displays a prototype of a Web 2.0 version of the daily 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. documents in the last year, by the Transportation Security Administration Moreover, the crank is not the only critical element in a prop-strike incident. This occurred during several discrete periods, i.e. PROPELLER STRIKE INSPECTIONS. 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. on 533 called "Recommendations Regarding Accidental Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip.". Inspect all engine accessories in accordance with the manufacturer's instructions.". Say the engine is turning only 1000 rpm, barely above an idle. 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. Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a slight stretch. So my question was, should I overhaul the present engine or look for one with good logs? offers a preview of documents scheduled to appear in the next day's 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." 2. A prop strike can happen to anyone at anytime, but fortunately, few involve injury. 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. All rights reserved. The degree of difficulty of this action will bevaried, depending on the installation and location of accessories, turbos, intercoolers, etc. Register, and does not replace the official print version or the official A Rule by the Federal Aviation Administration on 11/27/2000. There used to be, but it was kind of informal and there was a lot open to interpretation. Issued in Burlington, Massachusetts, on November 13, 2000. The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. 552(a) and 1 CFR part 51. In another incident a prop hit a small rock, which had been dislodged and thrown back by a larger aircraft. 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. (f) This amendment becomes effective on December 12, 2000. 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. This year's numbers have placed us in the top 10, highlighting another strong year of property development. I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. 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. You could identify its sound with your eyes closed. Other Lycoming literature mentions the importance to check the accessories as does TCM. At least thats our goal. documents in the last year, by the Fish and Wildlife Service My investigation started with my need for another engine for my Cessna 210. 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. Note the recurring theme of the loss of rpm or sudden stoppage of the engine runs as a key criteria for an internal inspection among the makers as well as the FAA. 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. That action was prompted by reports of crankshafts on which the connecting rod journals had fractured. documents in the last year, 41 Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. My group also argued about the propeller hitting grass and water. Recently, a transient aircraft hit a rubber traffic cone with the prop and kept going, taking off and disappearing into the western sky. 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. 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. For more than three decades, customers have trusted their airplanes to Triad Aviation, Inc. #1. 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. 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. 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 engine for sale was the model I needed, with about 1,000 hours since a factory overhaul. 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 I, 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. Assistant Manager, Engine and Propeller Directorate, Aircraft Certification Service. Register documents. The prop had a good-size dent in it, prompting the pilot to remove the prop and send it in for repair. 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. Some reports are quite specific about a recent prop strike in the engines history. Maybe it is and maybe it isn't." 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 For complete information about, and access to, our official publications These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". 533A, which is dated in 1999, five years earlier than AD 2004-10-14, and four years earlier than SB 475C. 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. For 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. on There's also the cost of inspection of the accessories, which is extra. Forums. Teledyne Continental Motors has a slightly different approach, but not much different in practice. Docket 2000-NE-16-AD. Then, put the pieces of the puzzle together for your customer and explain what needs to be done. ";s:7:"keyword";s:26:"continental prop strike ad";s:5:"links";s:467:"Majestic Mirage Alcohol List,
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