STC ST01904CH
FAA DRS lists ST01904CH as Current · Amended, held by Royal Air Inc, for Learjet 24, Learjet 24A, and Learjet 24B, and 15 more aircraft configurations. Recorded change: Installation of IS&S Air Data Display Units 9D-80130-15, Analog Interface Unit 9B-81040-30, and Rosemount model 0856NA pitot-static probes. Limited to Learjet 24 models with MKII wings, 300 kts Vmo airspeed limitation, and JET FC-110 autopilot. Excludes serial numbers 25-337, 25-352, 25-361, and 25-370 through 25-372. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST01904CH 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 24, Learjet 24A, and Learjet 24B, and 15 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
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Related avionics STCs
Replacement of three (3) Inertial Navigation Units (INUs) P/N 463001-6110-0412 (software P/N 92-04-12).
FAA holder: Northrop Grumman Systems Corporation
Installation of Litton Triple LTN-92 Inertial Navigation Systems (INS) and Dual LTN-2001 Global Positioning Sensors (GPS).
FAA holder: Northrop Grumman Systems Corporation
Installation of Litton Triple LTN-92 Inertial Navigation Systems (INS) and dual LTN-2001 Global Positioning Sensors (GPS).
FAA holder: Northrop Grumman Systems Corporation
Installation of Litton Dual LTN-410 Flight Management Systems (FMS) with embedded Global Positioning Sensors (GPS) receivers.
FAA holder: Northrop Grumman Systems Corporation