STC ST01720LA-D
FAA DRS lists ST01720LA-D as Current · Reissued, held by Learjet Inc., for Learjet 31, Learjet 35, and Learjet 35A (C-21A), and 2 more aircraft configurations. Recorded change: Dual Honeywell MST-67A Diversity Transponders for Elementary and Enhanced Surveillance. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST01720LA-D 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 31, Learjet 35, and Learjet 35A (C-21A), and 2 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Buyer checks
Confirm before sourcing
Related other aircraft modifications STCs
Installation of United Instruments encoding altimeter.
FAA holder: Mitsubishi Heavy Industries America Inc.
Installation of Gulton GB40 20 cell batteries or Marathon CA-5-20 cell batteries.
FAA holder: Mitsubishi Heavy Industries America Inc.
Installation of continuous ignition system.
FAA holder: Mitsubishi Heavy Industries America Inc.
Rewiring of auto-manual air conditioning switch.
FAA holder: Mitsubishi Heavy Industries America Inc.