Aircraft Alteration Questions
Review the previously answered aircraft alteration questions below. If you cannot find the answer to your question(s) there, then please feel free to submit your question(s) using the form below.
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Please remember that this is not legal advice. It is general information about the aircraft certification process. If you need legal advice, you should contact an aviation attorney.
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Address for FAA Form 337's
What address do I mail the FAA Form 337 for a newly installed supplemental type certificate (STC)?
ANSWER: Completed forms should be submitted to …
Would an installation of navigation equipment that requires the modification of the instrument panel be consider an alteration?
ANSWER: Yes, it …
FAA Form 337 Validity
An aircraft had several STC's installed by US repair stations and 337 forms completed while it was foreign registered (in Mexico).
It was then imported …
Manufacture of Parts
Can you advise whether it is normal for a manufacturing Production Certificate procedure to be used for the making of simple metal parts for alterations …
What is an aircraft alteration, and who can perform the alteration?
ANSWER: An aircraft alteration is usually done to improve upon a current aircraft …
Encoding Altimeter Use.
Can an Encoding Altimeter be installed as the primary Altimeter (Pilot's) if the Encoder portion of it has been disabled or has not been wired to the …
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