# STC SA5291SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 single axis automatic flight guidance system Model ST-012.
- Applied: January 6, 1984
- Status date: August 22, 1986
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/96/b9/96b9cfbd97611d383026d379cdbfd6d88634fc4bcd8661ad31b964e3bd39b928
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ED0519420D13DFBC86257ECA00777C39.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5291SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Textron Aviation Inc. 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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 - SA5291SW-D This certificate issued to: 1e. S-TEC Corporation Rt. 4, Blda. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Part 3 of the CIVIl Air

• Kegulations Original Product - Type tientificate Numben: ЗА12 Make: CESSNA Model: 172M, 172N, 172P AND 172Q Description of Type Design Change:

Installation of S-TEC System 60 Single Axis Automatic Flight Guidance System, Model ST-012, according to Bulletin No. 112, Revision 4, dated 7-01-86 and Master Drawing List No. 9225, Revision D, dated 7-01-86 and/or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on Cessna Models 172M, 172N and 172P when modified by 180 H.P.

Engine Conversion.

2. FAA Approved Supplemental Flight Manual, P/N 8922-2, dated 3-27-84 is required for Cessna Models 172M and 172N, S/N 17271034 and below and/or later FAA Approved revisions of the above supplement.

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

Date of Application: 1-6-84 Date Reissued: 8-22-86, Revision 1 Date of Issuance: . 3-27-84 Date Amended:

FEDERAL AVIATION By Direction of the Administrator Zeroed It Holders (Signature) TOMINISTRA DAS Staff Coordinator, DAS 5 SW Harold W. Holdeman (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA5291SW-D, Revision 1 Limitations and Conditions: (con't)

3. FAA approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 8942-1, dated 3-27-84 is required for Cessna Models 172N, S/N 17271035 and up and 172P and 172Q and/or FAA Approved revisions of the above supplement.

4. FAA Approved Supplemental Flight Manual, P/N 8922-3, dated 8-22-86 is required for Cessna Models 172M and 172N, S/N 17271034 and below and Cessna Models 172M and 172N, S/N 17271034 and below when modified by 180 H.P. Engine Conversion and/or later FAA Approved revisions of the above supplement.

5. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 8942-2, dated 8-22-86 is required for Cessna Models 172N, S/N 17271035 and up, 172P and 172Q and Cessna Models 172N, S/N 17271035 and up and 172P when modified by 180 H.P. Engine Conversion and/or later FAA Approved revisions of the above supplement.

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

**47 PAGE 2 OF 2 PAGES**

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 and street ) (City, Stale, and ZIP code) Extent of Authority (if licensing agreement):

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

U.S. GOVERNMENT PRINTING OFFICE: 1966 OF OF-205-579

## Every issue (1)

- August 22, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/96/b9/96b9cfbd97611d383026d379cdbfd6d88634fc4bcd8661ad31b964e3bd39b928)

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