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Where did you here that crankshafts need to be x-rayed every 200 hours? That would mean completely tearing an engine down... I'm fairly certain this almost nev
by Justin_K 5y ago
Where did you here that crankshafts need to be x-rayed every 200 hours? That would mean completely tearing an engine down... I'm fairly certain this almost never happens.
- sidewndr46 5y agoI'm assuming he is referring to the manufacturer's recommendations and not what is required to keep the engine airworthy. You can write in basically anything as a manufacturer, doesn't mean it is binding unless it is an official communication. For example, I have a dirt bike that states to replace the piston every 10 hours of operation.
- p_l 5y agoNot even fighter jet engines have such requirements, and those consider 300 hours overhauls to be short.
- sokoloff 5y agoI've owned multiple different piston-engined airplanes for the last 25 years. No mainstream aircraft engine has this requirement nor recommendation.
- FL410 5y agoIt doesn't. They might do that during an IRAN (Inspect and Repair As Necessary) which is essentially a full engine teardown, easily 5 figures. Certainly not done every 200 hours. Maybe it's a conflation of many piston aircraft engine manufacturers' recommendation for a TBO (time between overhauls), which is often around 2000 hours. This is essentially a full rebuild of the engine. However, in many cases it's not regulatory and more of a suggestion (there are exceptions, like certain commercial use of the aircraft).
- ericpauley 5y agoThey likely missed a 0. Even still, the 2000-hour TBO on most engines is only a recommendation for non-commercial operators.
- bluGill 5y agoI might have missed a zero, been a while since I looked. Required to rent your plane out, which is why many will skip it when a teardown isn't needed for other reasons.