FAA · Supplemental Type Certificate
STC SA2169NM
Installation of a Sensenich 72 CK series propeller, Gulfstream American spinner (P/N 506006-50), engine oil cooler on a Lycoming O-235-C2C engine.
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 (3)
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 ↗