FAA · Supplemental Type Certificate
STC SA8716SW
Replacement of Douglas P/N 22514-1 connector assy with Southern Aeroparts P/N S22514-1 for the lavatory actuator cable
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 (2)
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 ↗