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Other aircraft modifications

STC SA09156AC-D

FAA DRS lists SA09156AC-D as Current · Amended, held by S-TEC Corporation, for Cessna Aircraft 172, Cessna Aircraft 172A, and Cessna Aircraft 172B, and 1 more aircraft configuration. Recorded change: Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-633,. Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
4
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-633,.

SA09156AC-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 172, Cessna Aircraft 172A, and Cessna Aircraft 172B, and 1 more aircraft configuration. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Cessna Aircraft 1723A12Cessna Aircraft 172A3A12Cessna Aircraft 172B3A12Cessna Aircraft 172C3A12

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Cessna Aircraft 172 and Cessna Aircraft 172A, and 2 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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