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Other aircraft modifications

STC SA8403SW-D

FAA DRS lists SA8403SW-D as Current · Amended, held by S-TEC Corporation, for Beechcraft 56TC, Beechcraft 95-55, and Beechcraft 95-A55, and 10 more aircraft configurations. Recorded change: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-549. Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
13
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-549.

SA8403SW-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: Beechcraft 56TC, Beechcraft 95-55, and Beechcraft 95-A55, and 10 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Beechcraft 56TC3A16Beechcraft 95-553A16Beechcraft 95-A553A16Beechcraft 95-B553A16Beechcraft 95-B55A3A16Beechcraft 95-B55B3A16Beechcraft 95-C553A16Beechcraft 95-C55A3A16Beechcraft A56TC3A16Beechcraft D553A16Beechcraft D55A3A16Beechcraft E553A16Beechcraft E55A3A16

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Beechcraft 56TC and Beechcraft 95-55, and 11 more aircraft configurations model, serial range, and configuration?
  2. 02Which configuration, parts, installation data, limitations, and ICAs apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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