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Atlas / STC / SA5544NM

FAA · Supplemental Type Certificate

STC SA5544NM

Modification of the aircraft by installation of bladder fuel cells in the center wing to increase the auxiliary fuel capacity by 3750 gallons.

Current Surrendered Aircraft Large Multi-Engine Rev 09/12/2008 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 ↗