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Atlas / STC / ST03885AT

FAA · Supplemental Type Certificate

STC ST03885AT

Installation of an Avionica, Inc. avCM Cellular Module

Historical Reissued Aircraft Large Airplane Rev 03/24/2025 View PDF on drs.faa.gov ↗

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 (400)

+ 350 more aircraft

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 ↗