337/STC
I recently talked with the FAA Certification personal at the EAA Convention and I quote, " The best and easiest way to proceed is obtain a STC/337 from an already approved installation and use that information and approval to file my 337. It will speed things along and reduce the paper work." Also if you read FAA bulliten 94-32A it says the same thing. If you look realistically at it anything you install in an aircraft today is working off someone elses previous approval.
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