FAA · Supplemental Type Certificate
STC ST01675CH
Installation of Butterfly Valve Ring AIR23028 in starter control valves, part number 775538 or 799700.
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 (36)
- A35EU Airbus · A300 B2-1C
- A35EU Airbus · A300 B4-620
- A35EU Airbus · A300 B4-603
- A35EU Airbus · A300 B4-601
- A35EU Airbus · A300 B4-203
- A35EU Airbus · A300 B2-203
- A35EU Airbus · A300 B4-103
- A35EU Airbus · A300 B4-2C
- A35EU Airbus · A300 B2-1A
- A35EU Airbus · A300 B2K-3C
- A35EU Airbus · A300 B4-605R
- A35EU Airbus · A300 F4-622R
- A35EU Airbus · A300 F4-605R
- A35EU Airbus · A300 B4-622R
- A1NM The Boeing Company · 767-400ER
- A1NM The Boeing Company · 767-300F Series
- A1NM The Boeing Company · 767-300 Series
- A1NM The Boeing Company · 767-200 Series
- A20WE The Boeing Company · 747-100B SUD Series
- A20WE The Boeing Company · 747-100 Series
- A20WE The Boeing Company · 747-200B Series
- A20WE The Boeing Company · 747-200F Series
- A20WE The Boeing Company · 747-200C Series
- A20WE The Boeing Company · 747SR Series
- A20WE The Boeing Company · 747SP Series
- A20WE The Boeing Company · 747-300 Series
- A20WE The Boeing Company · 747-400 Series
- A20WE The Boeing Company · 747-400D Series
- A20WE The Boeing Company · 747-400F Series
- A20WE The Boeing Company · 747-100B Series
- A2NM The Boeing Company · 757 Series
- A2NM The Boeing Company · 757-200PF Series
- A2NM The Boeing Company · 757-200CB Series
- A2NM The Boeing Company · 757-300
- A22WE McDonnell Douglas Corporation · MD-11F
- A22WE McDonnell Douglas Corporation · MD-11
Certification basis — 14 CFR
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗