# STC SA3470SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century automatic flight system Model AK977 consisting of a Century 2010/2030/2031/2050/2051 autopilot.
- Applied: December 21, 1987
- Status date: January 20, 1993
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/e0/6f/e06f939bde4da00fa4f66d3ce38e8bf6aed7c9163b91fdc4e15ae5a787580730
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B98D49F6A94E6FD786257DC1005B1B0A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3470SW-D

## ADs that name it (0)

None.

## Approved models (10)

- Cessna Aircraft Company 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## 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.

Bmttfl States of aratrica Bepartmcnt of transportation— federal 2toiatton administration Supplemental 'Cgpe Certificate iSlwmve?*' SA3470SW-D tSl&gMta/tv Century Flight Systems, Inc.

P.M. 1195 P.O. Box 610 Mineral Wells, Texas 76068 ^^.^^^^ 3 civil Air 3A12 CESSNA 172D, 172E, 172F, 172O, 172H, 1721 172K, 172L, 172M, and 172N.

Installation of a Century Automatic Flight System, Model AK977 consisting of a Century 2010/2030/2031/2050/2051 Autopilot per Bulletin No. 2034, dated 12-10-87, Revision 2 dated 12-10-92 and Master Drawing List No. 87A1188, dated 12-10-87, Revision B dated 12-10-92 (14 Volt System) or later FAA/DAS Approved revision.

FAA/DAS Approved Supplement to Pilot's Operating Handbook and/or FAA/DAS Approved Airplane Flight Manual Supplements P/N 68S1015, dated 12-15-87 Rev. 1 dated 12-11-92 or later FAA/DAS Approved Revision and Century 2000 Autopilot Operator's Manual P/N 68S1035, dated 7-15-86 or later FAA Approved Revision.

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

12-21-87 12-31-87 Q1-2O-93 Rev.l (Signature) Michele M. Owsley Manager Airplane Certification'ffice AS W- 150 (Title)

FAA Fo«« 8110-2(10-68)

.NSTRUCTIONS: The transfer endorsement be.ow may be used ,o notify «he appropriate FAA Kepona. Office of

• he transfer of this Supplemenul Type Certificate.

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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) _ (Address of transferee).

from (Name of grantor) (Print or type) (Address of grantor) __ (City.Sitlt.

Signature of grantor (In ink):

## Every issue (1)

- January 20, 1993: Amended, Current. [certificate](https://openairdocs.org/files/sha256/e0/6f/e06f939bde4da00fa4f66d3ce38e8bf6aed7c9163b91fdc4e15ae5a787580730)

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