FAA · Supplemental Type Certificate
STC ST03861AT
Installation of Dual Collins DME-42 interrogator sensors (transceiver-receiver), Dual Antennas and 28 VDC circuit breakers. The scanning DME system will interface via the CSDB data bus with Universal Avionics UNS-1F or UNS-1Fw FMS system to provide distance indication.
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)
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 ↗