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Atlas / STC / ST01394WI-D

FAA · Supplemental Type Certificate

STC ST01394WI-D

Modification of a Collins CTL-23 or CTL-23C VHF COMM/NAV Control Panel System installation.

Current Issued Aircraft Large Multi-Engine Rev 07/12/2006 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 (73)

+ 23 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 ↗