# STC SA4243SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC system 60 two axis automatic flight guidance system Model ST-025
- Applied: November 3, 1980
- Status date: February 3, 1982
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/e0/cb/e0cbd7b7af3c761bfad59949cef760d864d967b318cefbf701e097a8454edc5d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96EF30850FEF4F4A86257DF9005A68CF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4243SW

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

United £tattt of America Bcpartmcnt of transportation— Jfttoal atriation administration Supplemental 'Cuje Certificate SA4243SW <-Sleaitta/i€>-nA/.

S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 x^^/i<^ 3 Civil Air 3A12 Cessna 172N, 172P installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-025 according to Bulletin No. 128, Revision 3, dated 12-21-81 and Master Drawing List 9226, Revision C, dated 12-21-81 with Optional Flight Director Steering Horizon; or later FAA approved revision. (28 Volt System) See Continuation Sheet, page 2, of this STC.

^ L/...6 „**»,</: 6/4/81; 8/25/81; 2/3/82 Revision 3 November 3, 1980 11, 1980 (Signature ) Don P. WatsonActing Chief, Aircraft Certification Division (Title)

**FAA FOIM 8110-2 (10-68)**

ttnittd $tatu of America Bepartment of TCranBportation—federal Station administration Supplemental t^pe Certificate(Continuation £heet) tSVMWlU&y- SA4243SW Revision 3 Limitations and Conditions:

1. FAA Approved Supplemental Flight Manual P/N 8923 dated December 11, 1980, or FAA Approved Supplemental Flight Manual P/N 8923-1 dated August 25, 1981, is required for Cessna Model 172N, S/N 17271034 and BELCW with S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-025.

2. Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement P/N 8970 dated August 25, 1981, is required for Cessna Model 172N, S/N 17271035 and ON with S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-025.

3. Pilot's Operating Handbook and FAA Approved Airplane Flight Manual Supplement P/N 8970-1 dated February 3, 1982, is required for Cessna Model 172N, S/N 17271035 and ON and Cessna Model 172P with S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-025.

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

Any alteration oj this certificate is punishable by a fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both.

**FAA FORM 8110-2-1 (1O-69) PAGE 2 OF 2 PAGES**

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) I Number and street) (City, State, and £1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and .?IP code ) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- February 3, 1982: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e0/cb/e0cbd7b7af3c761bfad59949cef760d864d967b318cefbf701e097a8454edc5d)

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