FAA · Supplemental Type Certificate
STC SH127WE
Installation of AiResearch TSE-331-3U-303N engine and related changes.
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 (3)
Specific sections
- Sec. 111
- Sec. 113
- Sec. 115
- Sec. 117
- Sec. 119
- Sec. 120
- § 21.47
- § 21.130
- § 21.183
- Sec. 29.902
- § 29.903
- Sec. 29.904
- Sec. 29.905
- Sec. 29.906
- § 29.907
- § 29.908
- Sec. 29.909
- Sec. 29.910
- Sec. 29.911
- Sec. 29.912
- Sec. 29.913
- Sec. 29.914
- Sec. 29.915
- Sec. 29.916
- § 29.917
- Sec. 29.918
- Sec. 29.919
- Sec. 29.920
- Sec. 29.998
- § 29.999
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗