STC SA4-1109
FAA DRS lists SA4-1109 as Current · Amended, held by Atlantic Coast Sea Planes LLC, for Grumman American Aviation G-21A and Grumman American Aviation G-21. Recorded change: Metalizing of wings aft of spar. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
SA4-1109 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.
Buyer checks
Confirm before sourcing
Related aircraft structures STCs
Installation of an increased security cockpit door.
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Replacement of flush-mounted Lower Beacon Light in lower fuselage and installation of an Upper Beacon Light on the vertical tail.
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Installation of passenger bubble window assemblies.
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Installation of crew bubble window assemblies.
FAA holder: Bell Helicopter Textron Inc.