# STC SA8398SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 two axis automatic flight guidance system, Model ST-540.
- Applied: June 1, 1994
- Status date: June 3, 1994
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/20/64/20640a20a6dd0261f7b8424a42f2bbad3e6f55d21ee94e0c28a1ebce54973efc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B28FEA59B0A2873885256CC20058E77F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8398SW-D

## ADs that name it (0)

None.

## Approved models (5)

- The Cessna Aircraft Company 310D ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310E (USAF U-3B) ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310F ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310G ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- The Cessna Aircraft Company 310H ([TCDS 3A10](https://openairdocs.org/tcds/3A10))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Arita Sams of A mia Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA839854-0 This certificate issued to: S-TEC Corporation 946 Pegram Mineral Wells, TX 76067 Certifies that the change in the type design for the folowing product with the lionitations and conditions thorefon as specified heronmeels the airworthiness reguirmonts of Port 3 of the CiVIl Air Regulations Original Product -TypeCortificate Numbon: 3A10 Make: Cessna Model: 3100, 310Е, 310F, 310G, and 310H Description of Type Design Change:

Installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model S1-340, according to Bulletin No. 640, dated 5-31-94 and Master Drawing List No.

92690, dated 5-31-94 with Optional Flight Director/Steering Horizon or later FAA Approved revisions of the above data.

1. Also eligible on Models 310G and 310H When Modified Per STC SA412S0 (300 H.P.

Colemill Conversion).

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

Thomas DAS Staff Coordinator, DAS 5 SW (Tille)

17.

FAR FORm 8110-2 (10-68)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA83985W-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Supplemental Flight Manual, P/N 8910/8, dated 5-31-94 is required tor Cessna Models 310D, 310E, 310F, 310G, and 310H and Models 310G and 310H When Modified Per STC SA412SO (300 H.P. Colemill Conversion) or later FAA Approved revisions of the above supplement.

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

FAA FORM 911062-1 (10-69) This certificate may be transferred in accordance with Fill 11.47.

**PAGE 20F 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-205-579

## Every issue (1)

- June 3, 1994: Issued, Current. [certificate](https://openairdocs.org/files/sha256/20/64/20640a20a6dd0261f7b8424a42f2bbad3e6f55d21ee94e0c28a1ebce54973efc)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.