# STC SA09511AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 20/30 single and two-axis automatic flight guidance systems, model ST-888-20/30.
- Applied: June 15, 2001
- Status date: June 19, 2001
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/f6/e5/f6e5b472bfa5767491306617f7763f9f5d0118c538330319f78fb88219253167
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AFC239927998408685256CC1007F3B32.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09511AC-D

## ADs that name it (0)

None.

## Approved models (4)

- Cessna Aircraft Company 310 ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310A ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310B ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Cessna Aircraft Company 310C ([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.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09511ACD This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Part 3 of the Civil dir Regulations.

Original Product I ype Certificate Number: 3A10 Make: Cessna Model: 310, 310A, 310B, and 310C Description of Type Design Change:

Installation of S-TEC System 20/30 Single and Two Axis Automatic Flight Guidance Systems, Model ST-888-20/30, according to Bulletin No. 988, dated 6-14-01 and Master Drawing List No. 921202, dated 6-14-01 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: 6-15-01 Date Reissued:

Date of Issuance: 6-19-01 Date Amended:

By Direction of the Administrator FEDERAL AVIATION (Signature) TOMINISTRATO Michael Keirnan DAS Staff Coordinator. DAS 5 SW (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09511 AC-D Limitations and Conditions: (con't.)

1. FAA/DAS Approved Supplemental Flight Manual, P/N 892083, dated 6-19-01 is required for Cessna models 310, 310A, and 310B for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 892084, dated 6-19-01 is required for Cessna model 310C for S-TEC System 20 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 892085, dated 6-19-01 is required for Cessna models 310, 310A, and 310B for S-TEC System 30 or later FAA Approved revisions of the above supplement.

FAA/DAS Approved Supplemental Flight Manual, P/N 892086, dated 6-19-01 is required for Cessna model 310C for S-TEC System 30 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 Porm 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) (City, State, and ZIP code ) from (Name of grantar) (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):

## Every issue (1)

- June 19, 2001: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f6/e5/f6e5b472bfa5767491306617f7763f9f5d0118c538330319f78fb88219253167)

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