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Posted

Lycoming engines had several different TBO's depending on internal configuration.  Valves stems, bearing dowels etc all were factors.

See Lycoming SI 1009 it covers the subject.

Clarence

Posted

Clarence, and I think TBO have been increased from the time the were introduced, presumably based on accumulated data. My current IO360 A1A used to have a 1600 TBO or even lower compared to the 2000 it has now. 

This and similar derivative charts are plagued with transcription errors. e.g., the engine model for the E, F is the A1A, not A1D, The F does not have 4.4 seats, and I suspect the F's VSo in not different from the G model. And I doubt that the performance number for the C and E remained the same over the years as speed claims became more realistic.  

Posted
18 hours ago, teejayevans said:

There is a summary of Mooney models you'll find but in every case it's truncated, missing Js and later...anyone have a full version?

I attended the MAPA Safety seminar a few months ago (highly recommended) and they have a section of the curriculum that has a more complete version. It’s a copyrighted material so I won’t post it, but maybe someone from MAPA is lurking and can provide it as a service to the folks here.

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