On 26 Nov 2003 13:51:09 -0800, (Paul Lee) wrote:

A am near applying for an airworthiness on my project and
need to specify engine model. For many registered experimentals
I see AMA/EXPR as engine manufacturer and UNKNOWN ENG for model
even though the engine is standard aircraft engine.

Is it advisable to use that declaration? I use an electronic
ignition and non factory fuel system. So it is not a certified
engine.

I think I would. It eliminates any problems later. Later on, if the
registration database says you've got a Lycoming and an FAA guy sees
something non-standard on it, he may claim you did the change subsequent to
receiving your airworthiness certificate and that you're in violation for
not repeating your Phase 1 test period.

If you list it as a Lycontinental, you also may be subject to the AD
notices. However, if you *don't*, you may not receive AD or service
notices that may affect your engine.

Offhand, though, my attitude is to give the Feds as little information as
they'll be happy with.

Ron Wanttaja