# STC SA5346SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 single axis automatic flight guidance system, Model ST-240.
- Applied: September 2, 1984
- Status date: October 10, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A13CE](https://openairdocs.org/tcds/A13CE)
- Certificate PDF: https://openairdocs.org/files/sha256/79/16/791603900347e51070cb4de8708dbbc658929b762839dd165d79c07d696eefb7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4ECD4F449F18B10B85256CC200122887.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5346SW-D

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company 177 ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177A ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))
- Cessna Aircraft Company 177B ([TCDS A13CE](https://openairdocs.org/tcds/A13CE))

## 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: SA53465W-D This certificate issued to: 11 S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Part 23 of the Federal Air Regulations.

Original Product - Type tientificate Numben: A13CE Make: CESSNA Model: 177, 177A AND 177B Description of Type Design Change:

Installation of S-TEC System 60 Single Axis Automatic Flight Guidance System, Model ST-240, according to Bulletin No, 340, dated 8-31-84 and Master Drawing List No. 92289, dated 8-31-84 and/or later FAA Approved revisions of the above data (14 Volt System).

1. FAA Approved Supplemental Flight Manual, P/N 89520, dated 10-10-84 is required tor Cessna Models 177, 177A and 177B, S/N 17702313 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: 9-02-84 Date Reissued:

Date of Issuance: . 10-10-84 Date Amended:

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

47.

FAA FoRM 9: 10-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Shect) Number: SA53465W-D Limitations and Conditions: (con't)

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89521, dated 10-10-84 is required for Cessna Model 177B, S/N 17702314 through S/N 17702672 and/or Tater FAA Approved revisions of the above supplement,

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

tatam of this vertıficate is punishable by a fine of not exceeding SL000, or uprsnment not excedıng 3 pars, or hatt i:. FORM 81102-1 (10-69) This certificate may be transferred in accndance with FAR -1 I 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, State, 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)

- October 10, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/79/16/791603900347e51070cb4de8708dbbc658929b762839dd165d79c07d696eefb7)

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