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Other aircraft modifications

STC SA09120AC-D

FAA DRS lists SA09120AC-D as Current · Amended, held by S-TEC Corporation, for Textron Aviation 337, Textron Aviation 337A, and Textron Aviation 337B, and 16 more aircraft configurations. Recorded change: Installation of S-TEC System 55/55X Two Axis automatic flight guidance system, Model ST-603. Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
19
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

SA09120AC-D 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: Textron Aviation 337, Textron Aviation 337A, and Textron Aviation 337B, and 16 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Textron Aviation 337A6CETextron Aviation 337AA6CETextron Aviation 337BA6CETextron Aviation 337CA6CETextron Aviation 337DA6CETextron Aviation 337EA6CETextron Aviation 337FA6CETextron Aviation 337GA6CETextron Aviation 337HA6CETextron Aviation M337BA6CETextron Aviation P337HA6CETextron Aviation T337BA6CETextron Aviation T337CA6CETextron Aviation T337DA6CETextron Aviation T337EA6CETextron Aviation T337FA6CETextron Aviation T337GA6CETextron Aviation T337HA6CETextron Aviation T337H-SPA6CE

Buyer checks

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