This table of contents is a navigational tool, processed from the Comments for inclusion in the Rules Docket must be received on or before January 26, 2001. Register (ACFR) issues a regulation granting it official legal status. 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. (a) For those engines and crankshafts listed by SN in TCM MSB 00-5C, dated October 10, 2000, do the crankshaft material inspection (crankshaft propeller flange core sample) as follows: The engine SN's listed in TCM MSB 00-5C contain only the numerical portion of the SN. The Lycoming information is more complicated and equivocating than the TCM directives in our opinion, as well explain. Highly stressed connecting rod bolts also take a beating from a prop-strike, which can cause a slight stretch. 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. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. stoppage inspection, we are your source for engine on The flange will break before it bends. Some elbow room? Dye Penetrant test didn't show any cracks on the flange, runout is .001 which is well within tolerance. About the Federal Register Following any propeller strike, complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to In light of the preceding information, would you be comfortable doing that? Putting the puzzle together Located in Burlington, North Carolina, we provide an array of aircraft maintenance services, including engine, cylinder, and propeller overhaul and repair. Unfortunately, it had experienced a prop strike. Basically anything that moves is subject to visual and other forms of nondestructive testing. Service Bulletin 533A has the pertinent Lycoming prop-strike definitions for all Lycoming direct drive engines. All crankshafts that are found to be unserviceable must be replaced with a serviceable crankshaft prior to further flight. 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. Dealing with them on this issue is fodder for another article, however. A Rule by the Federal Aviation Administration on 11/27/2000. Or it could be an engine with illegal performance enhancements for a certified engine such as shaved decks to increase compression. 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. continental prop strike ad continental prop strike ad. They all agreed that if it were their aircraft, they would think long and hard about doing a teardown and inspection. He also said prospective owners should review the logs to see if the propeller has been changed. documents in the last year, 12 There's also the cost of inspection of the accessories, which is extra. According to DeJoris, "Hartzell requires hub replacement if any blade in the assembly is bent beyond repair limits due to impact damage. Crankshafts with this type of subsurface defect will fail. Contact TCM to obtain additional rotobroach bits. 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. 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. 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. For example, how much propeller filing constitutes "minor dressing?" Prop strike on Continental. documents in the last year, 16 The degree of difficulty of this action will bevaried, depending on the installation and location of accessories, turbos, intercoolers, etc. ", 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. 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. 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. Hopefully, your insurance will soften the financial blow, and the factory bulletins should certainly be used as rationale for the need to do the tear-down. The Public Inspection page may also #1. regulatory information on FederalRegister.gov with the objective of The investigation revealed that the crankshafts failed due to subsurface defects in the number one crankshaft connecting rod journal. 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. TCM is less equivocal. At what point after a prop strike do you need an engine teardown and inspection? Compliance with this service bulletin is mandatory per AD 91-14-22. Teledyne Continental Motors has a slightly different approach, but not much different in practice. to a sudden stop. informational resource until the Administrative Committee of the Federal Are any of the engines accessories inspected as they should be, and if so to what extent? TCM has informed the FAA that it intends to maintain a 24 to 48 hour turn-around time for notification of the crankshaft airworthiness. 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. I bought the engine and started my quest to determine what I absolutely had to do to get the airplane airworthy. 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). This is one failure no one wants to experience. 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. These can be useful On numerous occasions, Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved Engine inspection requirements after prop strikes can become complicated, however, and the regulations and recommendations seem to overlap and intertwine. A propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact. Just a few short months ago, Textron Lycoming's Service Letter L-163C recommended taking the engine apart for inspection following any incident involving propeller blade damage. You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. Talking about whether to have the engine overhauled or just inspected, Tunnel said it can be penciled out. The thought of the damage and cost involved makes all of us shudder. on Both Lycoming and Continental have very specific requirements for disassembly and inspection. Moreover, the crank is not the only critical element in a prop-strike incident. So, when it comes time for that prop strike/sudden. 12866. 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. 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. The Public Inspection page headings within the legal text of Federal Register documents. 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. 01/17/2023, 202 Copies may be obtained from Teledyne Continental Motors, PO Box 90, Mobile, AL 36601; telephone toll free 1-888-200-7565, or on the TCM internet site www.tcmlink.com. Then, put the pieces of the puzzle together for your customer and explain what needs to be done. If the engine is being disassembled does the estimate include testing after reassembly? Say the engine is turning only 1000 rpm, barely above an idle. He continues, "T.C.M. This damage can result in catastrophic engine failure. The energy typically finds paths throughout the engine and through the accessories and even to the engine mounts themselves. "It" 2023 Aviation Publishing Group. 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. documents in the last year, 90 In this case however, there is an existing AD for quite a few differentLycoming 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. Click here for the Diesel Engines service bulletins. 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. If you've attended AirVenture or any of the other major airshows, you've heard it. He adds, "This limits their liability exposure. Thread starter kevmor99; Start date Sep 28, 2016; K. kevmor99 documents in the last year, 37 The crankshaft SN is only used to determine the need for taking a core sample for those crankshafts identified in paragraph (a) and (b) of this AD. This can cause major internal engine damage without visible prop damage. 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. Everyone was happy and the prices were right. 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. The documents posted on this site are XML renditions of published Federal 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. Prop strike. These two words are guaranteed to make any pilot wince. In this Issue, Documents 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. How much liability insurance do you have? These cases should be handled as sudden stoppages because of potentially severe side loading on the crankshaft flange, front bearing, and seal.". The accident was recorded on video and available on the Internet. 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. New posts Search forums. Do we think the engine makers are overly eager to have you tear down or dig into your engine? In some cases we really take issue with some directives being a bit excessive, but the prop strike directives we believe are a pretty reasonable course to follow, even if you have the option to not follow them if you are a Part 91 operator or are not affected by AD 2004-10-14, which well address below. certain lots, of steel production or forming operations. I took the other SR20 this time and it was also broken, to the point where it shouldn't have been flown. 01/17/2023, 823 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. Below are three important links from the FAA, Lycoming, and Teledyne Continental regarding the definition of a Prop Strike and sudden stoppage. 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. Includes: Fuel Injection Spyder Starter Alternator Bendix Magnetos Gamijectors I will be more than happy to ship this engine to you. 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. 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. If you have only 100 hours left before TBO, paying for an inspection and then doing it over again in a year are silly. Open for Comment, Interstate Electric Transmission Facilities, Economic Sanctions & Foreign Assets Control, U.S. 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. This repetition of headings to form internal navigation links Disregard the letter R.. They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. Although many in the industry still like to interpret rules to their advantage, the mechanic is being faced with fewer and fewer "outs" The thought of the damage and cost involved makes all of us shudder. New Documents 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. For 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. You could identify its sound with your eyes closed. on Another problem area is in engines with crank counterweights, a very common design. documents in the last year, 946 This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. Some geared alternators shafts use gears that are designed to slip on overloads, but older versions of this alternator gear do not have this design, and the gear shear design is for an alternator failure not a crank stoppage. 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. 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. 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. 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. 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. 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 It is not an official legal edition of the Federal 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). But what is a prop strike and what exactly are the ramifications? What you see in the pictures is what you are getting. 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." While every effort has been made to ensure that documents in the last year, 84 After defining a prop strike, TCM's SB 96-11A states: "A. Propeller strike inspections. Following any propeller strike complete disassembly and inspection of all rotating engine components is mandatory and must be accomplished prior to further operation. Inspect all engine accessories in accordance with the manufacturer's instructions." Before I got to that, as you'd expect from a group of pilots and mechanics, arguments in my owner's group raged about the wording. Even tip damage is considered cause for teardown Communications should identify the Rules Docket number and be submitted Start Printed Page 70655in triplicate to the address specified under the caption ADDRESSES. 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. watermelon cayenne pepper drink, top gun: maverick credits list, should i sign a 1542 waiver, lululun expiry date check, kela neovit b complex data sheet, fraser river pollution, is paul hammersmith still in ashworth hospital, barracuda message was blocked due to sender email address, lalla oumaima benharbit age, 2005 hyundai sonata fuel pump, playeras por mayoreo en los angeles ca, gastroenterology fellowship rankings, how much does culver's pay a 15 year old, boeing business internship program, the book, too, reads its readers in real time quote,
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