STC ST04393CH
FAA DRS lists ST04393CH as Current · Amended, held by Royal Air Inc., for Learjet 35, Learjet 35A (C-21A), and Learjet 36, and 4 more aircraft configurations. Recorded change: Avionics upgrade installation of a Garmin GTN (TM) 750 Touchscreen Navigator interfaced to existing pilot side instruments and existing FC-200 or FC-530/-550 Autopilot and added GWX (TM) 70 Weather Radar. The Garmin GTN (TM) 750 GPS is paired with the added GTX (TM) 345R (or GTX 33/33D) Transponders for Automatic Broadcast Surveillance (ADS-B) OUT and ADS-B IN (GDL-88) capability with wireless download connectivity utilizing Garmin Connext®. Optional second Garmin GTN (TM) 650/750 interfaced to existing copilot side instruments only. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST04393CH identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Learjet 35, Learjet 35A (C-21A), and Learjet 36, and 4 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
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