FAA · Supplemental Type Certificate
STC SA3104SO-D
Installation of a Teledyne Continental Motors model 10-550-L engine, a McCauley model D3A34C402/90DFA-10 propeller or a Hartzell PHC-J3YF-1RF/F7691 (propeller and other minor changes
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 (8)
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗