FAA · Supplemental Type Certificate
STC ST00959AT
Consolidate STC's SA3320SO,ST00141AT, ST00244AT, ST00245AT, AND ST00667AT. (400 S/N RJ-61 ONLY)
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.
Applicable aircraft (1)
Certification basis — 14 CFR
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗