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Avionics

STC ST09989SC

FAA DRS lists ST09989SC as Current · Amended, held by Aircraft Systems & Mfg, for McDonnell Douglas DC-9-87 (MD-87), McDonnell Douglas DC-9-83 (MD-83), and McDonnell Douglas DC-9-81 (MD-81), and 2 more aircraft configurations. Recorded change: Installation of Universal Avionics Multi-Function Display Model 640. Snapshot dated June 30, 2026.

FAA-listed holder
Aircraft Systems & Mfg
Aircraft configurations
5
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of Universal Avionics Multi-Function Display Model 640.

ST09989SC 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-9-87 (MD-87), McDonnell Douglas DC-9-83 (MD-83), and McDonnell Douglas DC-9-81 (MD-81), and 2 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-9-87 (MD-87)A6WEMcDonnell Douglas DC-9-83 (MD-83)A6WEMcDonnell Douglas DC-9-81 (MD-81)A6WEMcDonnell Douglas MD-88A6WEMcDonnell Douglas DC-9-82 (MD-82)A6WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-9-87 (MD-87) and McDonnell Douglas DC-9-83 (MD-83), and 3 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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