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Atlas / STC / SA2123NM

FAA · Supplemental Type Certificate

STC SA2123NM

Installation of Lycoming TIO-540-J2BD engine AiResearch Model THO8A60 Turbocharger, Hartzell HC-C3YR-1RF/F7854 (Three-Blade) propeller, Hartzell Model F4-13 Governor and associated Systems.\n\nNOTE: This approval is also extended to airplanes of these models that have incorporated the aileron droop system per STC SA1513WE and Flint Aero Wing Tip Tanks per STC SA43689WE.

Current Amended Aircraft Small Airplane Rev 10/25/2021 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 ↗