FREQUENTLY ASKED QUESTIONS > Incorporating the STC > Q: My A&P/IA says that a previous STC installed in my airplane precludes incorporating your STC. What now?

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Q:  My A&P/IA says that a previous STC installed in my airplane precludes incorporating your STC.  What now?

A:  This would be a very unusual situation.  However, should none of the "authorized persons" be willing to sign your 337, your investment is safe.  100% of your purchase price will be refunded, given that you return all documents along with a written explanation of why the STC could not be incorporated, within 60 days of purchase.