FAA · Supplemental Type Certificate
STC SA4428SW
Installation of 180 Horsepower Lycoming engine and propeller combination
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 (14)
- 3A12 Cessna Aircraft Company · 172M
- 3A12 Cessna Aircraft Company · 172R
- 3A12 Cessna Aircraft Company · 172P
- 3A12 Cessna Aircraft Company · 172F (USAF T-41A)
- 3A12 Cessna Aircraft Company · 172K
- 3A12 Cessna Aircraft Company · 172I
- 3A12 Cessna Aircraft Company · 172H (USAF T-41A)
- 3A12 Cessna Aircraft Company · 172G
- 3A12 Cessna Aircraft Company · 172L
- 3A12 Cessna Aircraft Company · 172E
- 3A12 Cessna Aircraft Company · 172D
- 3A12 Cessna Aircraft Company · 172B
- 3A12 Cessna Aircraft Company · 172N
- 3A12 Cessna Aircraft Company · 172C
Specific sections
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗