FAA · Supplemental Type Certificate
STC SA125NE
Installation of a 9KVA, 3 Phase, 115VAC power system and installation of 100A, 28VDC, power system for use as Special Missions Power
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 (4)
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 ↗