# STC SA3121SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic Flight System Model AK573 consisting of
Century II B Autopilot with Optional Radio Coupler
- Applied: March 1, 1976
- Status date: June 5, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A12SO](https://openairdocs.org/tcds/A12SO)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/53/1f53302ed78e773ce37db72f4c3ba71dcde0c03f47293725d52adaae4a0dae66
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/71545DEAF8CF253D85256CC2000A941A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3121SW-D

## ADs that name it (0)

None.

## Approved models (6)

- Commander Aircraft Corporation 112 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Corporation 112B ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Corporation 112TC ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Corporation 112TCA ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Corporation 114 ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))
- Commander Aircraft Corporation 114A ([TCDS A12SO](https://openairdocs.org/tcds/A12SO))

## 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.

Bcpartmcnt of transportation -federal auiation administration Supplemental ^gpe Certificate iSfavrrvvev' SA3121SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 23 Federal Aviation nA.

A12SO Rockwell Commander 112, 112B, 112TC, 112TCA, 114, and 114A r**nie™*f'-ye/—,eMm' ta^r^a^ :

Installation of Mitchell Automatic Flight System Model AK573 consisting of Century II B Autopilot with Optional Radio Coupler according to Bulletin No.

697, Revision 4, dated 1-10-79 and Master Drawing List No. 87A823, Revision D, dated 1-10-79 (14 Volt System) and/or later FAA Approved Revisions of the above data.

The following FAA/DAS Approved Pilot's Operating Handbook Supplements are required: P/N 68S326-1, dated 1-23-79 for Rockwell Commander 114 and 114A; P/N 68S378-1, dated 12-23-76 for Rockwell Commander 112TC and 112TCA;

P/N 68S429, dated 10-11-76 for Rockwell Commander 112B. The following FAA/DAS Approved Airplane Flight Manual Supplement is required: P/N 68S360, dated 3-19-76 for Rockwell Commander Model 112 and/or later FAA Approved Revisions of the above supplement .

other Piously approved modifications &r4ntm*i£u>n .U'^ 4-29-76; 10-11-76; 12-23-76;

1-23-79; 6-05-84, Revision 5 fJ 4ne -^'f Don P. Watson (Stgnatu,e) Manager, Aircraft Certification Division Southwest Region (Title)

FAA FotM SI 10-2 (10-68)

.NSTRUCTIONS: The transfer endorsement below may be used to notify «he appropriate FAA Regional Office of the transfer of thU Supplemental Type Certificate.

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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) ___ (Address of transferee) _ (Mumper *>* ttml) from (Name of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 5, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1f/53/1f53302ed78e773ce37db72f4c3ba71dcde0c03f47293725d52adaae4a0dae66)

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