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Other aircraft modifications

STC SA09121AC-D

FAA DRS lists SA09121AC-D as Current · Amended, held by S-TEC Corporation, for Cessna Aircraft F337E, Cessna Aircraft F337F, and Cessna Aircraft F337G, and 5 more aircraft configurations. Recorded change: Installation of S-TEC System 55 Two Axis Automatic Flight Guidance System, Model ST-603. Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
8
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of S-TEC System 55 Two Axis Automatic Flight Guidance System, Model ST-603.

SA09121AC-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: Cessna Aircraft F337E, Cessna Aircraft F337F, and Cessna Aircraft F337G, and 5 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft F337EA23EUCessna Aircraft F337FA23EUCessna Aircraft F337GA23EUCessna Aircraft F337HA23EUCessna Aircraft FT337EA23EUCessna Aircraft FT337FA23EUCessna Aircraft FT337GPA23EUCessna Aircraft FT337HPA23EU

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Cessna Aircraft F337E and Cessna Aircraft F337F, and 6 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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