FAA · Supplemental Type Certificate
STC SA2208CE
Installation of an optional third Sperry AH-600 attitude heading reference system (AHRS) wired into analog ports of the EFIS symbol generator (no autopilot/flight guidance computer input).
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 ↗