Hey Randy
The 51% rule if you notice is always applied to a kit.  If over 50% is assisted 
by assemblies or professional assistance, then it is manufactured not amateur 
built.  Apparently alot of the local DAR's being private and not "in" the FAA, 
but a private contractor have used the 51% rule as a measure of whether they 
should issue a repairman's certificate or not. But it really comes down to how 
much you actually build and whether he is confident that you know enough about 
how the airplane is constructed to perform your own condition inspections. Take 
away that one priviledge and there is no difference between what you can do on 
the plane before and after the certifcate.  It is not like once the 
airworthiness is issued that from then on you have tuse an A&P to repair your 
plane; nor does he have to sign it off. Just that the annual condition 
inspection must be signed off by at least an A&P. NOW, prudence would suggest 
that you should have a qualified person, another builder very familiar with the 
repair in question, or an A&P who knows that type of repair, to review your 
repair if it is something new to you. After all your life really does depend on 
it!
Have a good day,
Colin
> 
> From: "Randy Powell" <randywpow...@verizon.net>
> Date: 2006/07/25 Tue PM 09:09:49 EDT
> To: "KRnet" <kr...@mylist.net>
> Subject: Re: KR> 51% Rule
> 
> Colin,  Thank you for the information.   There seems to be a large gray 
> area on this  subject.
> 
> Randy
> 
> 
> 
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