# STC SA7787SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system, model ST-397.
- Applied: January 11, 1991
- Status date: April 28, 1997
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE)
- Certificate PDF: https://openairdocs.org/files/sha256/5a/bd/5abd1c437a37a3663b44eefe4df5def916930a750054ab9208d4025e54c88bf3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D1031C044D864DF085256CC20056A48F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7787SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Cessna Aircraft Company 414A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))
- The Cessna Aircraft Company 421C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE))

## 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.

gtale* ®f Epartment of tEranaportaiton - Jfeoeral JVfrtattait Olerttfttate SA7787SW-D S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 04 A7CE Cessna 414AAND421C Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-397, according to Bulletin No. 497, Revision 4, dated 4-15-97 and Master Drawing List No. 92530, Revision D, dated 4-15-97 with Optional Flight Director/Steering Horizon or later FAA Approved revisions of the above data (28 Volt System).

1 . Also eligible on Model 414A When Modified Per STC SE09104SC (335 H.P. Engine Conversion and 7,105 Lbs. Gross Weight Increase) and/or STC SA8125SW (Vortex Generators and Strakes).

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

1-11-91 1-23-91 a State a0t**u&/.- 4-28-97, Revision 1 \nature) William 3. Thomas DAS Staff Coordinator. DAS 5 SW.

(Title)

Pmiefc ^tales <Bf .America of 'ffiranapnrtatton - Jfeberal ^itmtlan JXhmmtslralt0n (Herttftcate SA7787SW-D, Revision 1 Limitations and Conditions (con't.)

2. FAA/DAS Approved Airplance Flight Manual Supplement, P/N 89906, dated 1-23-91 is required for Cessna Model 414A or later FAA Approved revisions of the above supplement.

3. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 89906, Revision 1, dated 4-28-97 is required for Cessna Model 414A And The Above Model When Modified Per STC SE09104SC (335 H.P. Engine Conversion and 7,105 Lbs. Gross Weight Increase) and/or STC SA8125SW (Vortex Generators and Strakes) or later FAA Approved revisions of the above supplement.

4. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N, P/N 891351, dated 4-28-97 is required for Cessna Model 421C or later FAA Approved revisions of the above supplement.

5. 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, Stair, and £IP cade) from (Name oj grantor) (Print or type) (Address of grantor) {.Wiimkfr and street) ('ilf. Slate, and -~Vr tode) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- April 28, 1997: Amended, Current. [certificate](https://openairdocs.org/files/sha256/5a/bd/5abd1c437a37a3663b44eefe4df5def916930a750054ab9208d4025e54c88bf3)

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