# STC SA5317SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 40/50 single and two axis automatic flight guidance systems, model ST-243-40/50.
- Applied: May 4, 1984
- Status date: May 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/sha256/1c/18/1c187ab951f1671d4e5f5482d2df934b8911f0343d2d3ea2709413f08d5991d6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8E3C854C786CD1BA85256CC200122856.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5317SW-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

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.

Bepartment of transportation— federal atriarion administration SupplementalCertificate SA5317SW-D S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 23 Federal

•Slea4i£ fspiatmd iJivaufj *yA&~Gier&£ca&±/utTrdeir-: AULt CESSNA 177, 177A, AND 177B n&e> :

Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-243-40/50, according to Bulletin No. 343, dated 5-01-84 and Master Drawing List No. 92275, dated 5-01-84 and/or later FAA Approved revisions of the above data, (14 Volt System).

1. FAA Approved Supplemental Flight Manual, P/N 89447, dated 5-10-84 is required for Cessna Models 177, 177A and 177B, S/N 17702313 and below for S-TEC System 40, and/or later FAA Approved revisions of the above supplement.

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

£zdrn,ivii&&cU0r'djA* 5-4-84 5-10-84 <^IwJe&t^c£U>n-&'£n4'<$Xcvrn4n4&€'r*i£pr- (Signature) Harold W. Hnldeman DAS Staff Coordinator, DAS 5 SW ___ (TitU)

Tkis artifuMti may bt tramferrtd in aecorjanee with FAR 21.47.

Hnitd £tatts of amtrica Bepartmtnt of ^transportation— federal auiation administration ^upplemtntal "Cgpt Certificate(Continuation £hect) SA5317SW-D Limitations and Conditions (con't)

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89448, dated 5-10-84 is required for Cessna Model 177B, S/N 17702314 through S/N 17702672 for S-TEC System 40, and/or later FAA Approved revisions of the above supplement.

3. FAA Approved Supplemental Flight Manual, P/N 89452, dated 5-10-84 is required for Cessna Models 177, 177A, and 177B, S/N 17702313 and below for S-TEC System 50, and/or later FAA Approved revisions of the above supplement.

4. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89453, dated 5-10-84 is required for Cessna Model 177B, S/N 17702314 through S/N 17702672 for S-TEC System 50, and/or later FAA Approved revisions of the above supplement.

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

FAA FORM 8HO-2-1 (1O-69) This certificate may be transferred in accordance with l-AR JI.J7 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 <7P 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):

U.S. GOVERNMENT PRINTING OFFICE : I »66 OF —205-579

## Every issue (1)

- May 10, 1984: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1c/18/1c187ab951f1671d4e5f5482d2df934b8911f0343d2d3ea2709413f08d5991d6)

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