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Flight controls

STC SA4-84

FAA DRS lists SA4-84 as Current · Surrendered, held by Alaska Airlines Inc, for McDonnell Douglas DC-4. Recorded change: Fiber gasket 4233666 in cowl flap actuating cylinder replaced with AN 6227-20 O ring. Snapshot dated June 30, 2026.

FAA-listed holder
Alaska Airlines Inc
Aircraft configurations
1
FAA revision date
FAA status
Current · Surrendered

Recorded modification

What the FAA record covers

Fiber gasket 4233666 in cowl flap actuating cylinder replaced with AN 6227-20 O ring.

SA4-84 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-4. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-4A-762

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-4 model, serial range, and configuration?
  2. 02Which control configuration, rigging, limitations, and inspections 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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