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Safety and emergency equipment

STC ST01159WI

FAA DRS lists ST01159WI as Current · Issued, held by Duncan Aviation Inc, for Learjet 31 and Learjet 35A (C-21A). Recorded change: Installation of a Honeywell MK-VIII Enhanced Ground Proximity Warning System (EGPWS). Snapshot dated June 30, 2026.

FAA-listed holder
Duncan Aviation Inc
Aircraft configurations
2
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Installation of a Honeywell MK-VIII Enhanced Ground Proximity Warning System (EGPWS).

ST01159WI 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 and Learjet 35A (C-21A). Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Learjet 31A10CELearjet 35A (C-21A)A10CE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Learjet 31 and Learjet 35A (C-21A) model, serial range, and configuration?
  2. 02Which equipment, inspection intervals, procedures, and limitations apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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