FAA · Supplemental Type Certificate
STC ST01017CH
Installation of an AlliedSignal CAS-81 TCAS II System with dual AlliedSignal Mode S Transponders.
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 (17)
- A6WE McDonnell Douglas Corporation · DC-9-81 (MD-81)
- A6WE McDonnell Douglas Corporation · DC-9-31
- A6WE McDonnell Douglas Corporation · DC-9-32
- A6WE McDonnell Douglas Corporation · DC-9-32F
- A6WE McDonnell Douglas Corporation · DC-9-33F
- A6WE McDonnell Douglas Corporation · DC-9-34F
- A6WE McDonnell Douglas Corporation · DC-9-51
- A6WE McDonnell Douglas Corporation · DC-9-15
- A6WE McDonnell Douglas Corporation · DC-9-82 (MD-82)
- A6WE McDonnell Douglas Corporation · DC-9-83 (MD-83)
- A6WE McDonnell Douglas Corporation · DC-9-41
- A6WE McDonnell Douglas Corporation · DC-9-14
- A6WE McDonnell Douglas Corporation · DC-9-13
- A6WE McDonnell Douglas Corporation · DC-9-12
- A6WE McDonnell Douglas Corporation · DC-9-11
- A6WE McDonnell Douglas Corporation · DC-9-15F
- A6WE McDonnell Douglas Corporation · DC-9-21
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗