# STC SA7781SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 two axis automatic flight guidance system, model ST-199.
- Applied: October 26, 1990
- Status date: June 19, 2002
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A25](https://openairdocs.org/tcds/3A25)
- Certificate PDF: https://openairdocs.org/files/sha256/a2/e7/a2e7a09d3b8731afc3922e7574cc8b6013551933bc858d8f3a318dbe47d0db3b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A6C93423DCB80D2286257FF5005E9E50.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7781SW-D

## ADs that name it (0)

None.

## Approved models (8)

- Textron Aviation Inc. 320 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320-1 ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320A ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320B ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320C ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320D ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320E ([TCDS 3A25](https://openairdocs.org/tcds/3A25))
- Textron Aviation Inc. 320F ([TCDS 3A25](https://openairdocs.org/tcds/3A25))

## 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: SA7781SW-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 I art 3 of the Civil d is Regulations.

Original Product I ype Certificate Number: ЗА25 Make: Cessna Model: 320, 320-1, 320A, 320B, 320C, 320D, 320E, and 320F Description of Type Design 6 hange:

Installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-199, according to Bulletin No. 299, Revision 14, dated 6-14-02 and Master Drawing List No. 92353, Revision N, dated 6-14-02 or later FAA Approved revisions of the above data (28 Volt System).

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

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of Application: 10-26-90 Date Reissued:

Date of Issuance: 12-06-90 Date Amended: 6-19-02 By Direction of the Administrator FEDERAL AVIATION тик.

(Signature) * TOMINSTRATO Michael Keirnan DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number SAT78ISW-D Limitations and Conditions: (con't.)

1. FAA Approved Supplemental Flight Manual, P/N 89898, dated 12-06-90 is required for Cessna Models 320B, 320C, 320D, 320E, and 320F and/or later FAA Approved revisions of the above supplement.

2. FAA/DAS Approved Supplemental Flight Manual, P/N 89898, Revision 1, dated 6-19-02 is required for Cessna models 320, 320-1, 320A, 320B, 320C, 320D, 320E, and 320F or later FAA Approved revisions of the above supplement.

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

INSTKUCTIONS: The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental ype Certificate.

The FAA will reissue the certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and streel) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) ( City. State, and SIP code!

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

## Every issue (1)

- June 19, 2002: Amended, Current. [certificate](https://openairdocs.org/files/sha256/a2/e7/a2e7a09d3b8731afc3922e7574cc8b6013551933bc858d8f3a318dbe47d0db3b)

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