On Thursday, May 21, 2020 at 7:01:09 AM UTC-7, wrote:
I invite anyone who thinks getting an STC approval is a simple process to just download this handy 96 page guide from the FAA.

https://www.faa.gov/documentLibrary/.../AC_21-40A.pdf

And, no, you can't just change the make/model on the paperwork and resubmit it. The process is the same for a different aircraft. (Pawnee vs. Cessna 185 etc.) You CAN apply for an STC within certain parameters for aircraft of a similar "family," like Cessna 180, 182, 185, but there are still differences that must be defined for each model unless the equipment, processes, installation and materials are IDENTICAL.

LOL! A few days ago you suggested that I should develop a KGARS and go into the business of selling it for a profit, hinting that this is easy-peasy. But you had no response when I said it would cost $1M. I have no illusions as to what the effort is to develop such a device. But, on the other hand, what is a life worth?

Tom