# STC SA09341AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-771.
- Applied: February 12, 1998
- Status date: February 16, 1998
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/51/b1/51b14ee0fc0bef7886ca9db36bca37f4efde068b58bdba14de689f2ec69e71fc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/229439A5AB72CD9F85256CC1007F3A9E.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09341AC-D

## ADs that name it (0)

None.

## Approved models (8)

- Cessna Aircraft Company 210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company 210R ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Cessna Aircraft Company T210R ([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: SA09341AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following froduct with the limitations and conditions therejor as speciped horeon meets the aiworthiness requiements of Fart 3 of the Cird i Regulations.

Original Product I ype Certifate Number: 3A21 Make: Cessna Model: 210L, T210L, 210M, T210M, 210N, T210N, 210R, and T210R Description of Type Design Change:

Installation of S-TEC System 30 ALT Altitude Hold System, Model ST-771, according to Bulletin No. 871, dated 2-11-98 and Master Drawing List No. 921075, dated 2-11-98 or later FAA Approved revisions of the above data (28 Volt System).

Also eligible on Models 210L, T210L, 210M, and T210M When Modified Per STC SA 1525WE (Robertson STOL).

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

If the holder agrees to permit another person to use this cortificate to alter the product, the holder shall give the other persen written cridence of that permission

suspended, revoked or a termination date is otherese established by the Administator of the Federal A viation Administration.

Date of Application: 2-12-98 Date Reissued:

Date of Issuance: 2-16-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION Weet hamee TOMINISTRATIOF William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

FAA For B110-2(10-68) Page 1 of 2

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number 5A09341 AC-D Limitations and Conditions: (con't.)

2. Also eligible on Model T210L When Modified Per STC SA2689SW (RAM Modification).

Also eligible on Models 210N and T210N When Modified Per STC SA756NW (Robertson STOL).

4. FAA/DAS Approved Supplemental Flight Manual, P/N 891666, dated 2-16-98 is required for Cessna Models 210L, T210L, 210M, T210M, and T210L When Modified Per STC SA2689SW (RAM Modification) or later FAA Approved revisions of the above supplement.

5. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891667, dated 2-16-98 is required for Cessna Models 210L, T210L, 210M, and T210M When Modified Per STC SA1525WE (Robertson STOL) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891668, dated 2-16-98 is required for Cessna Models 210N and T210N And The Above Models When Modified Per STC SA756NW (Robertson STOL) or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891669, dated 2-16-98 is required for Cessna Models 210R and T210R or later FAA Approved revisions of the above supplement.

8. 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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) _ (Address of transferee) - (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number * street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink) :

## Every issue (1)

- February 16, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/51/b1/51b14ee0fc0bef7886ca9db36bca37f4efde068b58bdba14de689f2ec69e71fc)

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