# STC SA09200AC-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-656-40/50.
- Applied: March 3, 1997
- Status date: March 19, 1997
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A17SW](https://openairdocs.org/tcds/A17SW)
- Certificate PDF: https://openairdocs.org/files/sha256/36/1e/361e192413367005133071ee97461b8f32d39c5df831c0a0bca6edf776fa3250
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8422846C7E923B1685256CC1007F3A0D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA09200AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Air Tractor Inc. AT-402A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))
- Air Tractor Inc. AT-402B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW))

## 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: SA09200 AC-D This certificate issued to: S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 Certifies that the change in the type design for the following product with the limitations and conditions therefor as spocifed horeon meets the avorthiness requiroments of Part 23 of the Tederal d viation Regulations.

Original Product I ye Certifcate Number: A17SW

AIR TRACTOR AT-402A and AT-402B Description of 9 spe Design Change:

Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST-656-40/50, according to Bulletin No. 756, dated 3-01-97 and Master Drawing List No. 92968, dated 3-01-97 or later FAA Approved revisions of the above data (28 Volt System).

FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891334, dated 3-19-97 is required for Air Tractor Models AT-402A and AT-402B for S-TEC System 40 or later FAA Approved revisions of the above supplement.

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

Date of Application: 3-03-97 Date rodsued:

Date of Issuance: 3-19-97 Date Amended:

FEDERAL AVIATION TOMINSTRATO William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA09200 AC-D Limitations and Conditions: (con't.)

2. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891335, dated 3-19-97 is required for Air Tractor Models AT-402A and AT-402B for S-TEC System 50 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

INSTRUCTIONS: The transfer endoraement below may be used to notify the appropriate FAA Regional Office of the transfer of the Supplemental Type Certificate.

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

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 & street) (City, State. and SIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- March 19, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/36/1e/361e192413367005133071ee97461b8f32d39c5df831c0a0bca6edf776fa3250)

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