FAA · Supplemental Type Certificate
STC ST04183AT
Installation of the Honeywell CAS-100 Traffic Alert and Collision Avoidance System (TCAS), Version 7.1, and the ACSS NXT-800 Mode S Transponder with associated hardware
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 (1)
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 ↗