Please, let me summarize what I see of the discussion: 1a. Bill has incontrovertible evidence that there are words that seem to indicate the original drawings are a critical part of the aircraft's type certificate and any deviation from that without permission means the aircraft is unworthy.
1b. John Cooper, a working A&P/AI, agreed that the skull cap spinner is not permitted without an approved form 337 for that aircraft but he didn't cite his documentary source. 2. Kevin and Bill Biggs, working A&P/AIs, say that what they are expected to go by is the Aircraft Specification or Type Certificate Data Sheet for that aircraft (though I've heard it called, incorrectly, the "type certificate"). For us, that means Aircraft Specification A-718 for the 415-C and 415-CD and Type Certificate Data Sheet A-787 for all the later models. Both documents are linked to from my Coupe page: http://edburkhead.com/Ercoupe/index.htm As Bill Briggs and Kevin say, there's no spinner listed in either A-718 or A-787. Are there ANY instances of the FAA pounding on someone, "violating" them with a reference back to the factory drawings? Ed Ed Burkhead (nasty and abusive forum dictator) http://edburkhead.com/Ercoupe/index.htm ed -at- edbur???khead.XXX change -at- to @, remove ??? and change XXX to com
