FAA · Supplemental Type Certificate
STC SA418SO
Installation of low oil pressure warning lights.
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 (9)
- A5SW Fairchild Aircraft Corporation · SA26-T
- 3A20 Raytheon Aircraft Company · 65-A90-1 (RU-21H)
- 3A20 Raytheon Aircraft Company · 65-A90
- 3A20 Raytheon Aircraft Company · 65-A90-1 (JU-21A)
- 3A20 Raytheon Aircraft Company · 65-A90-1 (U-21A)
- 3A20 Raytheon Aircraft Company · 65-A90-1 (RU-21A)
- 3A20 Raytheon Aircraft Company · 65-A90-1 (U-21G)
- 3A20 Raytheon Aircraft Company · 65-A90-1 (RU-21D)
- 3A20 Raytheon Aircraft Company · B90
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 ↗