Skip to content

Atlas / STC / ST04265AT

FAA · Supplemental Type Certificate

STC ST04265AT

Replacement of the inner aluminum barrel of the engine inlet cowl, with an inlet barrel of carbon graphite sandwich construction

Current Amended Aircraft Large Airplane Rev 12/04/2019 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.

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 ↗