After receiving several phone calls regarding STCs I was selling and comments about their high costs, I decided to write this article. With the hope it will enlighten the reader about the process of obtaining an STC and aircraft owners about the rationale behind the cost of an STC, I will cover in depth the steps I went through to obtain Multi-STCs.
In the small aircraft category there are four different processes available: Type Certificate, Multi-STC, One Time Only STC, and Field Approval—in this order and difficulty.
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