On Thu, 01 Apr 2004 07:44:33 +0000, jp wrote:

:The one caveat I can think of is if you use a certified engine to get the 25
:hour fly off time vice 40 hour time I think you'd probably be held to the
:AD.
:John

I've heard the same thing (though the version I've heard was certified
engine *and prop*)

But I've gotten a 25 hour fly off with a non-certified, modified
Lycoming and non-certified composite/wood prop. It looks like it's
whatever your DAR is comfortable with.

I comply with all the engine AD's I can, or at least take them as
serious warnings. Not because they're required, just because they
might be good ideas.