STC ST04457NY
FAA DRS lists ST04457NY as Current · Issued, held by Executive Air Craft Ltd, for Learjet 36A. Recorded change: Installation of the Honeywell CAS 67A TCAS II / Dual MST 67A Mode S Transponder Upgrade. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST04457NY 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 36A. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
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Related avionics STCs
Version 7.1 Software upgrade or Installation of the Aviation Communication & Surveillance Systems (ACSS) TCAS II, Model TCAS 2000, P/N 7517900-10020. The installation also includes a Mode S ATC Transponder System, Model XS-950, P/N 7517800-10007.
FAA holder: Aviation Communication and Surveillance Systems (ACSS) LLC
Version 7.1 Software upgrade of the Aviation Communication & Surveillance Systems (ACSS) TCAS II, Model TCAS 2000, P/N 7517900-10020 (Configuration 1) or Model T2CAS, P/N 9000000-11414 (Configuration 2). This upgrade allows for the installation of Configuration 1 TCAS II. The installation also includes a Mode S ATC Transponder System with ADS-B Out, Model XS-950, P/N 7517800- 10400.
FAA holder: Aviation Communication and Surveillance Systems (ACSS) LLC
Installation of the Universal Avionics FANS-1A+ in Gulfstream Aerospace Corporation model G-1159A aircraft.
FAA holder: Gardner Aviation Services