# STC SA1645SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system Model AK403, consisting of Century IIB autopilot with optional radio coupler.
- Applied: April 10, 1973
- Status date: July 16, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/2a/b0/2ab0557fa7d2d2a83d272898da143f4f80c91d0954758d3aaf12775e681938d7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6E9776B16D56279E85256CC1008214F1.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1645SW

## ADs that name it (0)

None.

## Approved models (8)

- 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))

## 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.

Bcpartmtnt of transportation —federal SIDiation administration Supplemental t^uje Certificate

t./Ktvrrvvefr' SA1645SW '/<> Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067

•^/leoafa&ftnA;

3 -^Aa Civil Air 3A12 Cessna 172D. 172E, 172F, 172G, J72H, 1721, 172K, J72L -naf ^ Installation of Mitchell Industries Automatic Flight System Model AK403 consisting of Century IIB Autopilot with optional Radio Coupler according to Bulletin 526 dated 10-4-72 and Master Drawing List 87A630 dated 12-27-72, Mitchell Industries, Inc. FM Approved Placard 13A689-403 is required.

»PP«>ved modifications -a, tJ dnf : April 10, 1973 April 25, 1973 *,**«„/ 7-16-8A, Revision Don P. Watson <S>g™»"<> Manager, Aircraft Certification Division Southwest Region (Ttttej __ __ 3 years, o< both.

Thii certificate may be transferred in accordance uiit/i £.4R 2!,47.

INSTRUCTIONS The transfer cndorsemcni below may be used lo noiify the appropriate FAA Regional Office of ihe transfer of [his Supplemental Type Certificate.

The FAA will reissue ihe certificate in ihe name of Ihe transferee and forward ii to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number .

to (Name of transferee) (Address of transferee) (Number and Ifretl} (City, Statt, and %IP t from (Name of grantor) (Print or type) (Address of grantor) umbei and tlrtel) I City, Slalr, a Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 69-S536**

## Every issue (1)

- July 16, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2a/b0/2ab0557fa7d2d2a83d272898da143f4f80c91d0954758d3aaf12775e681938d7)

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