STC ST00423DE-D
FAA DRS lists ST00423DE-D as Current · Amended, held by Learjet Inc, for Learjet 31, Learjet 35, and Learjet 35A (C-21A), and 2 more aircraft configurations. Recorded change: Installation of Honeywell MK VIII Enhanced Ground Proximity Warning System (EGPWS). Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
ST00423DE-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
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Installation of floor proximity emergency escape marking system.
FAA holder: Bruce Aerospace Inc.
Installation of floor proximity emergency escape path marking system.
FAA holder: Bruce Aerospace Inc.