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Other aircraft modifications

STC SA09523AC-D

FAA DRS lists SA09523AC-D as Current · Issued, held by S-TEC Corporation, for Waco Aircraft YMF. Recorded change: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, model ST-897-20/30. Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
1
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, model ST-897-20/30.

SA09523AC-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: Waco Aircraft YMF. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Waco Aircraft YMFATC 542

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Waco Aircraft YMF 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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