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Aircraft performance

STC SA4-591

FAA DRS lists SA4-591 as Current · Surrendered, held by Alaska Coastal Airlines, for Grumman American Aviation G-21A and Grumman American Aviation G-21. Recorded change: Increased maximum weight capacity of bow compartment. Snapshot dated June 30, 2026.

FAA-listed holder
Alaska Coastal Airlines
Aircraft configurations
2
FAA revision date
FAA status
Current · Surrendered

Recorded modification

What the FAA record covers

SA4-591 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: Grumman American Aviation G-21A and Grumman American Aviation G-21. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Grumman American Aviation G-21A654Grumman American Aviation G-21654

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