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Avionics

STC ST389CH

FAA DRS lists ST389CH as Current · Amended, held by Avionics Group Inc., for McDonnell Douglas DC-9-14, McDonnell Douglas DC-9-11, and McDonnell Douglas DC-9-13, and 4 more aircraft configurations. Recorded change: Installation of a Bendix/King CAS 81 TCAS II and Mode S transponder. Snapshot dated June 30, 2026.

FAA-listed holder
Avionics Group Inc.
Aircraft configurations
7
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of a Bendix/King CAS 81 TCAS II and Mode S transponder.

ST389CH 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: McDonnell Douglas DC-9-14, McDonnell Douglas DC-9-11, and McDonnell Douglas DC-9-13, and 4 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-9-14A6WEMcDonnell Douglas DC-9-11A6WEMcDonnell Douglas DC-9-13A6WEMcDonnell Douglas DC-9-15A6WEMcDonnell Douglas DC-9-15FA6WEMcDonnell Douglas DC-9-12A6WEMcDonnell Douglas DC-9-21A6WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-9-14 and McDonnell Douglas DC-9-11, and 5 more aircraft configurations model, serial range, and configuration?
  2. 02Which part numbers, software versions, interfaces, and manual changes 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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