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Atlas / STC / ST03930AT

FAA · Supplemental Type Certificate

STC ST03930AT

Installation of a Lead Acid Battery as a replacement for the existing Nickel-Cadmium Battery in accordance with Concorde Master Drawing List (MDL) 5-0372, Rev. C, Dated June 20, 2011 or later FAA approved revision.

Current Reissued Aircraft Large Multi-Engine Rev 12/19/2024 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 (11)

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 ↗