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.
Recorded modification
What the FAA record covers
Installation of S-TEC System 55/55X Two Axis automatic flight guidance system, Model ST-603.
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.
Buyer checks
Confirm before sourcing
- 01Does it cover the exact Textron Aviation 337 and Textron Aviation 337A, and 17 more aircraft configurations model, serial range, and configuration?
- 02Which configuration, parts, installation data, limitations, and ICAs apply?
- 03Who can legally supply the design data, kit, instructions, and ICAs?
- 04What parts, labor, conformity, and return-to-service work are excluded?
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