FAA · Supplemental Type Certificate
STC SA4282WE
Installation of inflatable door seal.
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)
- A-777 Textron Aviation Inc. · 35
- A-777 Textron Aviation Inc. · 35R
- A-777 Textron Aviation Inc. · A35
- A-777 Textron Aviation Inc. · B35
- A-777 Textron Aviation Inc. · C35
- A-777 Textron Aviation Inc. · D35
- A-777 Textron Aviation Inc. · E35
- A-777 Textron Aviation Inc. · F35
- A-777 Textron Aviation Inc. · G35
Certification basis — 14 CFR
Specific sections
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗