On Sunday, October 25, 2015 at 9:07:47 PM UTC-4, Brian wrote:
Why do you need a 337 if you are only install installing factory parts per factory drawings? You aren't modifing anything, just installing optional original equipment.
As I understand it this only requires a logbook entry by an A&P.
If you have to owner produce the parts, I don't think that changes anything as long as you can reasonably certify they match the factory drawing.

Brian

My read is that this is installation instructions for a Schweizer hitch not produced or provided by the factory. In any case it is an alteration where a 337 would be appropriate.

UH