FAA · Supplemental Type Certificate
STC SA4840NM
lnstallation of Pratt & Whitney of Canada PT6A-67R engines, Hartzell HC-B5MA-3/Ml 1276 or HC-B5MA-3( )/Ml 1691N, K model propellers, modified fuel system, revised electrical system, and forward fuselage extension
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)
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗