FAA · Supplemental Type Certificate
STC ST03399AT
Installation of internal and external mounting provisions for mission system equipment (MSE) that include internal and external structural mounts and racks, external fairings and mission wiring provisions
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 ↗