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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

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

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