# STC SA10439SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Chelton Aviation Corporation, United States
- Description: Installation of a Chelton Aviation Corp (CAC) AP-3C autopilot.
- Applied: October 30, 2004
- Status date: August 4, 2005
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/81/d8/81d8e7e833544a07969c57c82ffcea7697c11829533c45a501fa8acc2f15f7e0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2FF5206C961EA963862570990050E72A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA10439SC

## ADs that name it (0)

None.

## Approved models (5)

- Twin Commander Aircraft Corporation 560-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-E ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 720 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Project No. ST7981SC-A GDM

FAA Form 8110-2(10-68) Page 1 of 2 Number SA10439SC This Certificate issued to Chelton Aviation Corp 5011 Sabre Drive Denton, TX 76207

Part 23 of the Civil Air Regulations.

Original Product Type Certificate Number : 2A4 Make : Twin Commander Model : 560-F, 680, 680-E, 680-F, 720

Description of Type Design Change: Installation of a Chelton Aviation Corp (CAC) AP-3C autopilot accordance with Master Drawing List No. ST7981SC-A-12, Rev. A, dated June 29, 2005 or later FAA approved revision. FAA approved Airplane Flight Manual Supplement ST7981SC-A-14, Rev. I. R., dated August 4, 2005, or later FAA approved revision is required.

Limitations and Conditions: Compatibility of this design change with previously approved modifications must be determined by the installer. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person writeen evidence of that permission.

Date of application : October 30, 2004

Date of issuance : August 04, 2005 Date reissued :

( Signature) Fred Stellar Acting Manager, Special Certification Office Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number SA10439SC Date of Issuance: August 04, 2005

Certification Basis: Regulations at the latest amendments 23-0 through 23-55

23.143, 23.253, 23.301, 23.303, 23.305, 23.391, 23.395, 23.397, 23.561, 23.601, 23.603, 23.605, 23.607, 23.069,

23.611, 23.613, 23.671, 23.672, 23.677, 23.685, 23.689, 23.777, 23.779, 23.1301, 23.1307, 23.1309, 23.1321, 23.1322,

23.1329, 23.1351, 23.1357, 23.1381, 23.1431, 23.1529, 23.1555, 23.1581, 23.1583, 23.1585

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## Every issue (1)

- August 4, 2005: Issued, Current. [certificate](https://openairdocs.org/files/sha256/81/d8/81d8e7e833544a07969c57c82ffcea7697c11829533c45a501fa8acc2f15f7e0)

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