FAA · Supplemental Type Certificate
STC SA3-717
Installation of Model 4000 main skis and Model 1500, CT-3600, CT-3200 with 8-inch tail wheel, or CT-3400 with 8-inch tail wheel-tail skis.
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 (7)
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗