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Other aircraft modifications

STC ST165CH

FAA DRS lists ST165CH as Current · Reissued, held by USA Jet Airlines Inc., for McDonnell Douglas DC-9-31, McDonnell Douglas DC-9-32, and McDonnell Douglas DC-9-32F, and 5 more aircraft configurations. Recorded change: Fabrication and installation of a Stage 3 hushkit when powered by Pratt & Whitney JT8D-7, -9, or -11, -15, or -17 series engines. Snapshot dated June 30, 2026.

FAA-listed holder
USA Jet Airlines Inc.
Aircraft configurations
8
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Fabrication and installation of a Stage 3 hushkit when powered by Pratt & Whitney JT8D-7, -9, or -11, -15, or -17 series engines.

ST165CH 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-9-31, McDonnell Douglas DC-9-32, and McDonnell Douglas DC-9-32F, and 5 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-9-31A6WEMcDonnell Douglas DC-9-32A6WEMcDonnell Douglas DC-9-32FA6WEMcDonnell Douglas DC-9-33FA6WEMcDonnell Douglas DC-9-34A6WEMcDonnell Douglas DC-9-34FA6WEMcDonnell Douglas DC-9-41A6WEMcDonnell Douglas DC-9-51A6WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-9-31 and McDonnell Douglas DC-9-32, and 6 more aircraft configurations model, serial range, and configuration?
  2. 02Which configuration, parts, installation data, limitations, and ICAs 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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