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Atlas / STC / SA1397SO

FAA · Supplemental Type Certificate

STC SA1397SO

Remove drain plug, Cessna Part Number MS20913-10 or MS20913-ID, from the fuel selector valve, and replace with CAV-110D (MT-1082) or CAV-110H-4D (CM-1082)

Current Reissued Aircraft Small Airplane Rev 09/28/2020 View PDF on drs.faa.gov ↗

What is an STC?

A Supplemental Type Certificate authorizes a major modification or alteration to an FAA-certificated aircraft. STCs are how operators legally install new avionics, change fuel systems, add floats, swap engines, etc. — every change beyond a minor modification needs one.

Certification basis — 14 CFR

Specific sections

The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗