FAA · Supplemental Type Certificate
STC SE00022EN
Installation of Oil Tank Filler Neck Check Valve.
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 (10)
- E21NE Pratt & Whitney Canada Inc. · PT6B-36
- E21NE Pratt & Whitney Canada Inc. · PT6B-36A
- E22EA Pratt & Whitney Canada Inc. · PT6T-3
- E22EA Pratt & Whitney Canada Inc. · PT6T-3A
- E22EA Pratt & Whitney Canada Inc. · PT6T-3B
- E22EA Pratt & Whitney Canada Inc. · PT6T-6
- E26NE Pratt & Whitney Canada Inc. · PT6A-66
- E26NE Pratt & Whitney Canada Inc. · PT6A-67
- E26NE Pratt & Whitney Canada Inc. · PT6A-67A
- E26NE Pratt & Whitney Canada Inc. · PT6A-67R
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 ↗