FAA · Supplemental Type Certificate
STC SA10370SC
Installation of exhaust gas extractors on Pratt & Whitney Canada PT6A-21, -28, -29, -34, -34B, -135, or -135A turboprop engines
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 (6)
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗