# STC SA3431SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Century Automatic Flight System Model AK935 consisting of a Century 21 Autopilot
- Applied: July 8, 1985
- Status date: July 10, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A13](https://openairdocs.org/tcds/3A13)
- Certificate PDF: https://openairdocs.org/files/sha256/bc/ea/bcea48a9ebe94260b5dab1d48fc6678a6746896c6975df0187ebea55268a7a83
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B88B2163EF96788385256CC2000A9802.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3431SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 182Q ([TCDS 3A13](https://openairdocs.org/tcds/3A13))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA343154-D This certificate issued to: . Century F11ght Systems, InC.

F.M. 1195 P.O. Box 610 Mineral Wells, Texas 76067 Certifies that the change in the type design for the following preduct with the limitations and condilions Herefer as specified hereen meels the airwanthiness reguirement's of Parl 3 of the CIVII AIT Hegulations.

Original Product -Type berlificaterNumber: 3A13 Make: Cessna Model: 182Q Description of Type Design Change:

Installation of Century Automatic Flight System Model AK935 consisting of a Century 21 Autopilot according to Bulletin No. 1066, dated 5-09-85 and Master Drawing List No. 87A1144, dated 5-09-85 (28 Volt System) and/or later FAA approved revision.

Pilots Operating Handbook and FAA Approved Airplane Flight Manual Supplement, P/N 685975, dated 5-09-85 and/or later FAA approved revision is required.

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

Date of Application: 7-08-85 Tale meissucd:

Date of Issuance: 7-10-85 Date Amended:

DERAL AVIATION By Direction of the Administrator Jw CAMINISTRAIOS William L. Johns DAS Staff Coordinator DAS 7 . (Signature) (Tule)

47.

FAX Foon 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) _ (Address of transferee) (279185 preo sequins") from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel ;

(spo 812 pes 10) Extent of Authority (if licensing agreement):

Signature of grantor (In ink): - + 11< r. 01. 1098-462.080

## Every issue (1)

- July 10, 1985: Issued, Current. [certificate](https://openairdocs.org/files/sha256/bc/ea/bcea48a9ebe94260b5dab1d48fc6678a6746896c6975df0187ebea55268a7a83)

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