# STC SA1445SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Commuter Air Technology Inc, United States
- Description: Modification of Mitchell automatic flight system AK221 installed per STC SA680SW.
- Applied: April 10, 1970
- Status date: July 13, 2012
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1)
- Certificate PDF: https://openairdocs.org/files/sha256/b9/7d/b97dc0d6c44539d374cbdfa584a16975aca4a306df9b627d93d3136a4f720b04
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E1C22B87C7D33BA386257A3A006986F2.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1445SW

## ADs that name it (0)

None.

## Approved models (4)

- Twin Commander Aircraft Corporation 500-A ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-B ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-S ([TCDS 6A1](https://openairdocs.org/tcds/6A1))
- Twin Commander Aircraft Corporation 500-U ([TCDS 6A1](https://openairdocs.org/tcds/6A1))

## 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.

Number SA1445SW

This Certificate issued to Commuter Air Technology Inc.

7200 NW 63 rd Street Bethany, OK 73008

Part 3 of the Civil Air Regulations.

Description of Type Design Change: Modification of Mitchell Automatic Flight System Model AK221 installed per STC SA680SW according to Downtown Airpark, Inc. Drawing List DA50029, Revision A, dated March 13, 1972. Amendment 1 is for modification of Mitchell Automatic Flight Control System Models AK353, FD/AP 282-353, AK 600/FD, and AK601 installed per STC SA680SW according to Downtown Airpark, Inc., Drawing List DA50029, Revision B, dated January 3, 1989.

Limitations and Conditions Applicable FAA Approved Airplane Flight Manual Supplement required per STC SA680SW. The installer must determine whether this design change is compatible with previously approved modifications. 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.

6A1

Aero Commander

500A, 500B, 500U, 500S Original Product Type Certificate Number :

Date reissued : April 21, 2006; June 8, 2006;

July 13, 2012

Date amended : January 26, 1989, Rev. 1

( Signature) Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office

( Title) Date of application : April 10, 1970

Date of issuance : March 13, 1972

Number (STC No.)

Limitations and Conditions continued

## Every issue (2)

- July 13, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b9/7d/b97dc0d6c44539d374cbdfa584a16975aca4a306df9b627d93d3136a4f720b04)
- June 8, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/20/ca/20caf01d5f77d7625ea0b11b5c523be6158260c5fa23cc19cad29e36d6516f1a)

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