cubpilot2
SPONSOR
Anchorage Alaska
Ed,
If you follow the procedure which I described above in post #50, Dave's process would become an "approved" repair for the specified tires. It would be legal on a certified airplane when accomplished in accordance with the procedure. If Dave wants to be able to allow others to use the procedure, he needs to be sure not to have anything written into it which says words to the effect "when accomplished by Dave".
I hate to feel pessimistic but to the best of my knowledge getting a "multiple use field approval" like those that Dans Aircraft has, is a thing of the past.
If Dave wants to sell this system I would expect the current FSDO to send him through the STC engineering route. He would have expensive testing to do to prove the adhesion of the product and prove that it does not impact the original composition; along with anything else they can dream up.
I have a friend that have lately tried to get an approval on his T-craft for a C-150 exhaust (which was already installed when he bought it) using prior field approvals for data. Juneau said that wouldn't work as that they wanted proof testing of the carb heating along with flight testing. He luckily found an engineer in Texas who had the engineering specs to satisfy the feds. $$