# STC SA09164AC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system, Model ST-528.
- Applied: August 6, 1996
- Status date: August 8, 1996
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/6e/9d/6e9d35e06b3753e93aa72d24f86d4ec7c81d398642b72551f444414e4b516fa4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0FD84EAB17CDEBD485256CC1007F39FA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA09164AC-D

## ADs that name it (0)

None.

## Approved models (2)

- Twin Commander Aircraft LLC 560-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft LLC 560-E ([TCDS 6A1](https://openairdocs.org/tcds/6A1))

## What the certificate says

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

*Baited Scares of Serica Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA09164AC-0 This certificate issued to: S-TEC Corporation 946 Pegram Mineral Wells, TX 76067 Certifies that the change in the type design for the following produch with the limilations and conditions shamefor as specifed hereon meets the airworthiness requismonts of Port 3 of the CIVIl Air Regulations Original Product -Type Contificato Number: 6A1 Make: Twin Commander Model: 560-A and 560-E Description of Type Design Change:

ST-528, according to Bulletin No. 628, Revision 1, dated 6-06-96 and Master Drawing Limitations and Conditions:

1. FAA/DAS Approved Pilot's Operating Handbook and/or Airplane Flight Manual Supplement, P/N 891269, dated 8-08-96 is required for Twin Commander Models 560-A and 560-E or later FAA Approved revisions of the above supplement.

2. Compatibility of this modification with other previously installed modifications must be determined by the installer.

Date of Application: 8-06-96 Date Reissued:

Date of Issuance: . 8-08-96 Date Amended:

FEDERAL AVIATION By Direction of the Administrator HOMINIS William J. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

**FAA FOR 8110-2 (10-68)**

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

The EAA will reissue the certificate in the name of the transferee and forward it to lim.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (CitY, State. and ZJP code) from (Name of grantor) (Print or type) (Address of grantor) (Number 4 street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 8, 1996: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6e/9d/6e9d35e06b3753e93aa72d24f86d4ec7c81d398642b72551f444414e4b516fa4)

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