# STC SA1458SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system AK318 consisting of Century III autopilot with optional automatic pitch trim, radio coupler, and glide slope coupler.
- Applied: December 23, 1970
- Status date: July 10, 1984
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20)
- Certificate PDF: https://openairdocs.org/files/sha256/e0/4e/e04e1f97439f228014d5c61935623aa1bdceccae0230c037a66cf49ae2119c2b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4E1104DEACCEE70E85256CC10082114A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1458SW

## ADs that name it (0)

None.

## Approved models (2)

- Beechcraft Corporation B90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Beechcraft Corporation C90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))

## 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.

£Jrtai>nfi6 • Btpartmcnt of transportation —Jfedera! adiation administration Supplemental TCyje Certificate *yKu#rvvw'SA1458SW Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 Civil Air 3A2U Beech B-90, C-90 Installation of Mitchell Automatic Flight System Model AK318 consisting of Century III Autopilot with optional Automatic Pitch Trim, Radio Coupler, and Glide Slope Coupler per Bulletin No. 429 Revision (3) dated 9-14-72 and Master Drawing List 87A528 Revision C dated 9-14-72. Installation of Mitchell Radio Coupler Model 1C388-3 per Bulletin No. 611 Revision (1) dated 4-16-74 and Master Drawing List No. 87A708, Revision A, dated 4-16-74.

FAA Approved Autopilot Flight Manual dated April 14, 1972, is required.

FAA Approved Autopilot Flight Manual Supplement dated April 16, 1974, is required for Mitchell Radio Coupler Model 1C388-3, December 23, 1970 April 24, 1972 °thei" Previously ^proved modifications 4& 10-20-72; 4-26-74; 7-10-84 Revision 3 Don P. Watson Manager, Aircraft Certification Division Southwest Region ( Title)

This certificate may be transferred in aciordance with f-AR 21.17.

FkAFou.ll !O-}{lO-6>)

INSTRUCTIONS; The transfer endorsement below may be used lo notify the appropriate FAA Regional Office of the transfer of [nil Supplemental Type Certificate.

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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) and ilittt} , Stall, and flP cod,) from (Name of grantor) (Print or typt) (Address of grantor) r and itrrft) , Slalr, Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 68.S536**

## Every issue (1)

- July 10, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e0/4e/e04e1f97439f228014d5c61935623aa1bdceccae0230c037a66cf49ae2119c2b)

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