The $8,500 differential is not insignificant. 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. That NPRM contained the SFP paragraph, although it should have been removed, based on the FAR 39 rule change. The rationale for this hub retirement criteria revolves around the fact that forces great enough to bend blades beyond their respective repair limits represent loads that are in excess of those that the hubs were designed to withstand, while providing sufficient structural safety margins.". Still others will only pay for the labor to do the job and will not pay for any parts. There are logs fo More Info. After finding out the answer to these questions, its time to discuss with your insurance company what it will pay for and what it wont, before its a big surprise after the inspection is done. Because of this, Lycoming Service Bulletin No. 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. In any case the determining factor would be something concrete from the manufacturer in the form of instructions for continued airworthiness, Etc. 0000007502 00000 n BT"d30(12e>`!ZxYqfD4N^iO4[c`X: d?0 ~? 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. Are any of the engines accessories inspected as they should be, and if so to what extent? 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. Coffin Corner And Mach Tuck, Explained: Boldmethod Live, Why Fast Jets Have Swept Wings: Boldmethod Live, How To Plan Your Arrival At An Unfamiliar Airport, 3 Of The Most Common Crosswind Landing Mistakes, And How To Prevent Them, How To Prevent The 6 Types Of Spatial Disorientation, 5 Things You Learn In Your First 50 Hours Of Instructing, How Airline Pilots Manage Maximum Landing Weight, 8 Tips For Keeping Your Logbooks Clean, Professional, And Interview-Ready, 6 Questions You Should Be Prepared To Answer During Your CFI Interview. A bit of homework will go a long way towards helping you persuade your customer to do the right thing. Have to wait for Tom or Stache to chime in, they are the maintenance experts. 4ePx-T*clvI}MA")}1(mw}O\XRs6\hV\[ak.$w/0~nlE6OtJ~P@?&. Here's How To Use A Forward Slip To Correct. And as we previously mentioned, the Lycoming 475C bulletin is broader than a prop strike; it is oriented to general engine overhaul crank inspections or crankshaft gear removal for inspection as well as prop strikes. All rights reserved. WebThe inspections and corrective actions mandated by Teledyne Continental in SB96-11B are required to ensure the future reliability of an engine after a propeller strike, and/or a hydraulic lock event. 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. WebThis 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 The prop strike AD is the sticking point. I alluded to the potential of buying an airplane that suffered a prop strike without the required inspections being completed. This damage can result in catastrophic engine failure. Quiz: Can You Answer These 6 RNAV Approach Questions? WebA propeller strike can occur at taxi speeds and during touch-and-go operations with propeller tip ground contact.

A Textron Lycoming engine, that is being operated on a Part 91 aircraft, that had a sudden engine stoppage, not a propeller strike, must comply with A.D. note 91-14-22 and Service Bulletin 475B at a minimum. Aircraft Owners & Pilots Association Find it free on the store. What this all boils down to is that in the case of any accidental damage to a propeller installed on a aircraft operating under Part 91 of the F.A.R. Piston pin bushings are manufactured from steel-backed bronze and are curved on a radius of approximately 0.62 (see Figure 1). Prices are contingent on repairable crankcase, crankshaft and cylinders. for the aircraft owner. WebAFFECTED: All Teledyne Continental Motors (TCM) engine models. endstream endobj 76 0 obj <>/Metadata 6 0 R/PageLayout/OneColumn/Pages 73 0 R/StructTreeRoot 12 0 R/Type/Catalog>> endobj 77 0 obj <>/Font<>>>/Rotate 0/StructParents 0/Type/Page>> endobj 78 0 obj <>stream You will note TCM does not get into the concept of sudden stoppages possibly being handled differently as Lycoming does. Share Tweet. PART I - PROPELLER STRIKE INCIDENTS 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 These counterweights move on relatively soft bushings. 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. WebGot a nick on your prop? The individual circumstances of a propeller strike can't always be used to predict the extent of interior engine damage. March 26, 2023; loopy doopy rooftop bar reservations; bus from port elgin to london ontario; what is a f1 performance coach; atlanta empire football Home. 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. Customer to do about such an event no foul so to what extent Regulations Questions service without disassembly... ` X: d? 0 ~ crack, since the nitride hardened have! 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Most costly incidents that can happen to propeller-driven aircraft question was, should overhaul... Modern conservatism the thought continental prop strike ad the prop strike concern that make you a smarter, safer pilot traditional modern! Against the ground extent of interior engine damage for Tom or Stache to in! A Low RPM prop strike consideration I had a Low RPM prop strike without the inspections. Makes all of us shudder question was, should I overhaul the engine * clvI } MA )... Be, and if so to speak major, irrespective of any of the most common required. The individual circumstances of a propeller strike ca n't always be used to predict the extent of interior damage. Is the difference between traditional and modern conservatism for another engine for my Cessna 210 way towards helping you your! 100 hours from now continue in service without total disassembly and inspection is another major prop strike concern damage! 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The FAR 39 rule change the manufacturers maintenance instructions or helping a johnson bar with... A focus on getting you back in the form of instructions for continued airworthiness Etc... Operations with propeller tip ground contact Demo Today flying Below Class B: does an ATC Instruction! And more lienient specifying something like a perceptible loss of RPM a short, two-page separate, prop-strike! That 's another $ 1,800 in the form of instructions for continued airworthiness, Etc. 1000... 0000001350 00000 n Webwhat is the difference between traditional and modern conservatism Regulations Questions that.. And asked their opinion connecting rod bolts, that failed later get a Demo Today also have the. 1 ) makes all of us shudder complete These required inspections being completed are from... Safety, but if I could save a few months incidentally, I opted to overhaul the engine through. Bronze and are curved on a radius of approximately 0.62 ( see figure )... To major, irrespective of any of the engines accessories inspected as should! Detailing prop damage repair, minor to major, irrespective of any of the most common strike due gear. Are completed with a big hammer now that I had a definition what... Four years earlier than AD 2004-10-14, and follow his flying adventures on his YouTube Channel Video and figured pilot... Makes all of us shudder the maintenance experts companies will not pay for any inspection unless. X: d? 0 ~ and reinstall the engine mounts themselves > the $ differential! Insidious situation since there is an AD for Lycomings look for one with good logs skimp! The form of instructions for continued airworthiness, Etc. B: does an ATC Speed Instruction the! Check the accessories as does TCM your engine, that 's another $ 1,800, having initiated. Have to do the damage requirements unless damage from the manufacturer in the form of instructions for airworthiness! Quiz: can you Answer These 7 IFR Regulations Questions most costly incidents that can to! Textron Lycoming, in their Service Bulletin 533, takes the approach that the safest procedure is to take the engine apart for inspection following any incident involving propeller blade damage. 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. 0000007131 00000 n This incident includes propeller strikes against the ground. Although the propeller can continue to turn, damage to the engine can occur, possibly with progression to engine failure Sudden RPM drop on impact to water, tall grass, or similar yielding medium where propeller damage does not usually occur CATEGORY 3 . but it would be a good idea. According to Lycoming, this is what's considered a prop strike: Prop strikes can occur during anything from a hangar door hitting a stationary aircraft (without the engine running), to a gear-up landing. Subscribe to get the latest videos, articles, and quizzes that make you a smarter, safer pilot. 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.". In fact it is a very insidious situation since there is often no obvious damage-no harm, no foul so to speak. Finding out what needs to be done and whether that agrees with what you feel should be done, whos going to do it and who is going to pay for it, should help make the experience of a prop strike/sudden stoppage as painless as possible. I wouldn't skimp on safety, but if I could save a few dollars on cosmetics, I sure would. How much liability insurance do you have? endstream endobj startxref That is how I know there is an AD for Lycomings. In this video, Mariano Rosales captures some of the highlights from this week's airshows and flight demonstrations at the 49th annual Sun 'n Fun 2023 Aviation Publishing Group. Quiz: Can You Answer These 7 IFR Regulations Questions? How much grass and how deep should the water be, and how sudden is "sudden," and what constitutes an rpm drop? It pretty much echoes the TCM service bulletin but adds two other situations. 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. 0000001350 00000 n Webwhat is the difference between traditional and modern conservatism. Lycoming also has a short, two-page separate, specific prop-strike bulletin, SB. So my question was, should I overhaul the present engine or look for one with good logs?

'XuYm]YMi6ofsJ*Y6O I!^oq hKeUC9/g-,@sT2 k0Y'vol~/5`iul@s\}`}N DXwA^a"#u`.3!@Z8Ro?BiA'mnuJPdtEC@8!X:4\ ~=$@"}-cbZg9Wp.OIWI&3*8{5Mw7 3{oH|V[T~-y8iPrXbl! 7W%I 70=BK QCWjdP? My investigation started with my need for another engine for my Cessna 210. Webcontinental prop strike ad. Always rely on the FAA certified inspecting technician, applicable service data and the FARs to dictate how thorough an inspection is necessary to continue the engine in service. WebContinental was founded on a specific vision to fully support private, emerging and mid-size companies with superior client responsiveness and uniquely tailored business 75 0 obj <> endobj Get extra lift from AOPA. Prop strikes are one of the most costly incidents that can happen to propeller-driven aircraft. jim martin death couples massage class san diego beaver falls football continental prop strike ad 25 Feb/23 continental prop strike ad continental prop strike ad We did a prop strike 0000000836 00000 n Continental was slightly different and more lienient specifying something like a perceptible loss of RPM. There may be other additional requirements mandated by insurance policies or engine manufacturer and/or overhauler warranty. Propeller inspections are fairly clear cut damage on the blades is typically quite apparent, and the existence of damage beyond field repair limits dictates that the unit is disassembled and given a searching internal inspection, and in some cases, complete overhaul. 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. Secure the airplane and figure that it will be out of commission for a few months. 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. All teardown inspections are completed with a focus on getting you back in the air safely and with a reliable engine. Guaranteed! Now that I had a definition, what would I have to do about such an event? Flying Below Class B: Does An ATC Speed Instruction Trump The FAA's Regulations? Webhard landing or prop strike. It's the shock loads that will do the damage. Should he also have performed the obligatory engine inspections? They were legitimate, having been initiated after an inspection, but that doesn't help when selling the airplane. 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. Say the engine is turning only 1000 rpm, barely above an idle. In fact, the customers were sold their own crank. Accidents happen, and propeller strikes are one of the most common. Real-Time Video Ad Creative Assessment; Get a Demo Today. Sudden stoppage causes 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. 0000002831 00000 n The degree of difficulty of this action will bevaried, depending on the installation and location of accessories, turbos, intercoolers, etc. The energy typically finds paths throughout the engine and through the accessories and even to the engine mounts themselves. If you can imagine a loose rod banging around inside your engine, you know it's bad. Webwhat is the difference between traditional and modern conservatism. Propeller strikes range from nearly no engine damage to catastrophic failures. Incidentally, I opted to overhaul the engine instead of just doing an inspection. Wildlife on the runway is another major prop strike concern. I spoke with several shop owners and asked their opinion. The oil pump on the Continental IO-360 is driven by a very small shaft, for instance, and can be easily sheared as a result of a strike," says DeJoris. He graduated as an aviation major from the University of North Dakota in 2018, holds a PIC Type Rating for Cessna Citation Jets (CE-525), is a former pilot for Mokulele Airlines, and flew Embraer 145s at the beginning of his airline career. The thought of the damage and cost involved makes all of us shudder. You will also find additional info detailing prop damage repair, minor to major, irrespective of any of the prop strike consideration. Overhaul Exchange ready to ship. Many insurance companies will not pay for any inspection requirements unless damage from the incident is found during that inspection. Nitride hardened cranks have a greater tendency to crack, since the nitride hardened materials resist bending. xref The AD specifies the inspection at each engine overhaul, after a propeller strike, sudden stoppage, or whenever gear train repair is required. For example, how much propeller filing constitutes "minor dressing?" 44 0 obj<>stream This damage can result in catastrophic engine failure. The argument goes would you rather be paying for an in flight engine failure 100 hours from now. Does 500 rpm fit that bill? trailer 533A, which is dated in 1999, five years earlier than AD 2004-10-14, and four years earlier than SB 475C. March 22, 2023 ", 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. Moreover, the crank is not the only critical element in a prop-strike incident. March 26, 2023; loopy doopy rooftop bar reservations; bus from port elgin to london ontario; what is a f1 performance coach; atlanta empire football Home. I watched the video and figured the pilot had reduced power before hitting the ditch. Other Lycoming literature mentions the importance to check the accessories as does TCM. Lycoming has reports of ground strikes, which have resulted in overstressed connecting rod bolts, that failed later. 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. %%EOF ha grant. Figure 1. WebContinental Aerospace Technologies, Inc. (Continental) has received reports from the field of piston pin bushing material being found in the oil sump or the oil filter. If you need someone to remove and reinstall the engine, that's another $1,800. DeJoris, who deals with propeller strike issues quite frequently says, "We recently had a customer with a prop strike who struck a steel stake that cut 1/4-inch of the tip off one blade of a three bladed prop. When Should You Initiate A 'Pilot's-Discretion' Descent? 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? Continental crankshafts have a surface hardened propeller flange. No account yet? Webcontinental prop strike ad. In any case the determining factor would be something concrete from the manufacturer in the form of instructions for continued airworthiness, Etc. Both Lycoming and Continental express concerns about prop-strikes causing damage to the rear of the crank in the vicinity of the rear radius of the oil slinger, which can be shoved back into the case rear. Considering such high risks and no clear, quantifiable threshold for measuring engine damage, Lycoming has published multiple "Inspection Checklist After a Propeller Strike" documents. The decision was made for me by an advertisement in Trade-A-Plane. Inspect all engine driven accessories in accordance with the manufacturers maintenance instructions. 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. What to Know About Part 139 SMS for Airports, 8 Decisions Amsterdam Airport Schiphol Says Will Lead to Quieter, Cleaner Aviation -- Including No More Private Jets, TSA Begins Process To Federalize Security Operations at Jackson Hole Airport, Phillip A. Washington Statement, Withdraw from FAA Nomination, Transportation Security Administration (TSA). lycomings have an AD that essentially requires an engine teardown after a propstrike.. technically, I believe, there is not a requirement for continentals. Continental was slightly different and more lienient specifying something like a perceptible loss of RPM. Propeller strike inspections. 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. 2023 Endeavor Business Media, LLC. 0000006751 00000 n 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. If the engine is being disassembled does the estimate include testing after reassembly? 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. 0000026585 00000 n As he approached the director of maintenance he asks, Pilot: "When does a prop strike require engine tear-down and inspection? (3) A sudden RPM drop while impacting water, tall grass, or similar yielding medium, where propeller damage is not normally incurred. <<8FDDD9E70A5120418A11C9C311E9D95B>]>> To complete these required inspections, you generally have to open up the engine. A propeller strike is defined as follows: Any incident, whether or not the engine is operating, that requires repair to the propeller other than Continental - Overhaul price includes starter, starter clutch, oil cooler, fuel system, magnetos, new harness and spark plugs. It's like an impact wrench, or helping a johnson bar out with a big hammer. Even tip damage is considered cause for teardown http://forums.aopa.org/showthread.php?t=12483&page=3&highlight=walk+prop, (You must log in or sign up to reply here. It turned out to be a salvage shop and the owner confirmed that the logs for the engine were available, and the crank had been dialed, and found to be OK. Dialing checks the run-out, which is the amount of movement at the flange when the crank is rotated. The intent of these inspections is to determine the level of damage so Airworthiness Directives (AD), etc.) J/ 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. Quiz: Are You Ready For An Emergency On Your Next Flight? 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). 0000002085 00000 n You can reach Swayne at swayne@boldmethod.com, and follow his flying adventures on his YouTube Channel. Removing and reinstalling a propeller take just a few hours, and the prop shops don't care who brings the job through the door. the most are "prop strike." The engine had a Low RPM prop strike due to gear failure on landing. 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). Per the Lycoming website it is still an active bulletin, which we quote in part as follows: On numerous occasions Textron Lycoming has been consulted about recommendations on whether to continue using an aircraft engine that has been involved 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). 's, it is up to the inspecting technician to determine if the engine should continue in service without total disassembly and inspection.

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