# STC SA09010AC-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 55/55X Two Axis automatic flight guidance system, Model ST-589
- Applied: June 8, 1995
- Status date: June 1, 2001
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/07/9d/079d67b55b588ccd213d389fee87aac2c2117473a6bd097c2b51e5a5150ea99f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B8FF5378A88641CE85256CC1007F399D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09010AC-D

## ADs that name it (0)

None.

## Approved models (8)

- Cessna Aircraft Company 210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09010AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Past 3 of the Civil I i Regulutions.

Original Product Type Certificate Number: 3A21 Make: Cessna Model: 210G, T210G, 210H, T210H, 210J, T210J, 210K, and T210K Description of 5 ype Design Change Installation of S-TEC System 55/55X Two Axis Automatic Flight Guidance System, Model ST-589, according to Bulletin No. 689, Revision 3, dated 6-01-01 and Master Drawing List No. 92790, Revision C, dated 6-01-01 or later FAA Approved revisions of the above data (14 Volt System).

(See Continuation Sheet, Page 2, a part of this STC.)

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of Application: 6-08-95 Date Reissued:

Date of Issuance: 6-14-95 Date Amended: 4-09-99, 6-30-00, 6-01-01 By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINISTRATIOR Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

nce with FAR 21.47

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09010AC-D Limitations and Conditions: (con't.)

1. Also eligible on Cessna models T210G, T210H, T210J, and T210K when modified per STC SA2689SW (RAM modification).

Also eligible on all of the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) or STC SA966CE (Horton STOL).

FAA/DAS Approved Supplemental Flight Manual, P/N 891176, dated 6-14-95 is required for Cessna Models 210G, T210G, 210H, T210H, 210J, T210J, and Models T210G, T210H, and T210J When Modified per STC SA2689SW (RAM Modification) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891839, dated 4-09-99 is required for Cessna models 210K and T210K and Cessna model T210K when modified per STC SA2689SW (RAM modification) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891176, Revision 1, dated 6-30-00 is required for Cessna models 210G, T210G, 210H, T210H, 210J, T210J and models T210G, T210H, and T210J when modified per STC SA2689SW (RAM modification) and the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) or STC SA966CE (Horton STOL) or later FAA Approved revisions of the above supplement.

6. FAA/DAS Approved Supplemental Flight Manual, P/N 891839, Revision 1, dated 6-30-00 is required for Cessna models 210K and T210K and Cessna model T210K when modified per STC SA2689SW (RAM modification) and the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) or STC SA966CE (Horton STOL) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891176, Revision 2, dated 6-01-01 is required for Cessna models 210G, T210G, 210H, T210H, 210J, T210J and models T210G, T210H, and T210J when modified per STC SA2689SW (RAM modification) and the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) or STC SA966CE (Horton STOL) for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 891839, Revision 2, dated 6-01-01 is required for Cessna models 210K and T210K and Cessna model T210K when modified per STC SA2689SW (RAM modification) and the above models when modified per STC SA1525WE (Robertson STOL) or STC SA1048CE (Horton STOL) or STC SA966CE (Horton STOL) for S-TEC System 55/55X or later FAA Approved revisions of the above supplement.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

FAA Form 8110-2-1 (10-69) Page 2 of 2

## Every issue (1)

- June 1, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/07/9d/079d67b55b588ccd213d389fee87aac2c2117473a6bd097c2b51e5a5150ea99f)

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