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Posted for CHBAviation@aol.com:

My experience with this has been:  If you do nothing except take it out of
the box and hang on your airplane, it is still classified as a certified
engine.  If you put any parts on that are non certified it then falls into
the Experimental category.  This is according to the insurance people.  If
you change your engine from a certified classification to an experimental
category, you must notify them immediately.  However the FISDO office in
Denver claims once the engine goes onto and EXP airplane, regardless if you
do something or nothing, it falls in the EXP category.  When inspection time
comes and you've done nothing to the engine you will get 25 hours.  However
if you've done anything to change it's classification you get 40 hours.  The
reason for the classification change per FISDO, is their having problems with
people making modifications and not documenting accordingly.  The changes may
or may not be legal for the future aircraft that engine may end up in.

Chuck Brenner
CHB Aviation LLC

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