FAA · Supplemental Type Certificate
STC SA1294SO
Installation of an adjustable nine-inch trim tab on left aileron.
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 (15)
- 3A12 The Cessna Aircraft Company · 172G
- 3A12 The Cessna Aircraft Company · 172K
- 3A12 The Cessna Aircraft Company · 172A
- 3A12 The Cessna Aircraft Company · 172B
- 3A12 The Cessna Aircraft Company · 172C
- 3A12 The Cessna Aircraft Company · 172D
- 3A12 The Cessna Aircraft Company · 172E
- 3A12 The Cessna Aircraft Company · 172F (USAF T-41A)
- 3A12 The Cessna Aircraft Company · 172
- 3A12 The Cessna Aircraft Company · 172I
- 3A12 The Cessna Aircraft Company · 172L
- 3A12 The Cessna Aircraft Company · 172M
- 3A12 The Cessna Aircraft Company · 172N
- 3A12 The Cessna Aircraft Company · 172P
- 3A12 The Cessna Aircraft Company · 172H (USAF T-41A)
Certification basis — 14 CFR
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗