FAA · Supplemental Type Certificate
STC ST04441CH
Installation of Honeywell RESCU 406AFN2 Emergency Locator Transmitter (ELT) System Upgrade in accordance with CertifyNation Master Data List, Doc. No. CN19-044MDL-00, Revision 0, dated March 04, 2020., or later approved revision.
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 (3)
Specific sections
The STC PDF on drs.faa.gov is the authoritative document — it lists installation instructions, ICA requirements, and any limitations. Open PDF ↗