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Other aircraft modifications

STC SA09548AC-D

FAA DRS lists SA09548AC-D as Current · Issued, held by S-TEC Corporation, for Twin Commander Aircraft 690C, Twin Commander Aircraft 690D, and Twin Commander Aircraft 695, and 1 more aircraft configuration. Recorded change: Installation of S-TEC/Chelton CA370S Air Data Attitude Heading Reference System (ADAHRS). Snapshot dated June 30, 2026.

FAA-listed holder
S-TEC Corporation
Aircraft configurations
4
FAA revision date
FAA status
Current · Issued

Recorded modification

What the FAA record covers

Installation of S-TEC/Chelton CA370S Air Data Attitude Heading Reference System (ADAHRS).

SA09548AC-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: Twin Commander Aircraft 690C, Twin Commander Aircraft 690D, and Twin Commander Aircraft 695, and 1 more aircraft configuration. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Twin Commander Aircraft 690C2A4Twin Commander Aircraft 690D2A4Twin Commander Aircraft 6952A4Twin Commander Aircraft 695A2A4

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Twin Commander Aircraft 690C and Twin Commander Aircraft 690D, 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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