# STC SA09379AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-831-20/30,
- Applied: September 15, 1998
- Status date: September 17, 1998
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A4CE](https://openairdocs.org/tcds/A4CE)
- Certificate PDF: https://openairdocs.org/files/sha256/c7/50/c75010dd1b963ac1e22121cc98ea172e6134a48affd45cc2b6e615d370e672c7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E18B7F99E22ACBEC86257D180067E38C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09379AC-D

## ADs that name it (0)

None.

## Approved models (14)

- Cessna Aircraft Company P206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company P206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company P206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TP206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TP206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TP206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TU206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TU206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TU206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company TU206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company U206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company U206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company U206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Cessna Aircraft Company U206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))

## 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: SA09379AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the Livil dir Regulations.

Original Product I ype Certificate A'unter: A4CE Make: Cessna Model: P206C, TP206C, 0206C, TU206C, P206D, TP206D, U206D, TU206D, P206E, TP206E, U206E, TU206E, U206F, and Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-831-20/30, according to Bulletin No. 931, dated 9-14-98 and Master Drawing List No. 921107, dated 9-14-98 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Supplemental Flight Manual, P/N 891774, dated 9-17-98 is required for Cessna Models P206C, TP206C, U206C, TU206C, P206D, TP206D, U206D, TU206D, P206E, TP206E, U206E, TU206E, U206F, and TU206F for S-TEC System 20 or later FAA Approved revisions of the above supplement.

(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: 9-15-98 Date Reissued:

Date of Issuance: 9-17-98 Date Amended:

By Direction of the Administrator FEDERAL AVIATION sall 12.

(Signature) TOMINISTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title) or both.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09379AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Supplemental Flight Manual, P/N 891775, dated 9-17-98 is required for Cessna Models P206C, TP206C, U206C, TU206C, P206D, TP206D, U206D, TU206D, P206E, TP206E, U206E, TU206E, U206F, and TU206F for S-TEC System 30 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

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):

Date of Transfer: _ Signature of grantor (In ink):

## Every issue (1)

- September 17, 1998: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c7/50/c75010dd1b963ac1e22121cc98ea172e6134a48affd45cc2b6e615d370e672c7)

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