# STC SA757SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK234 consisting of Century II autopilot with optional radio coupler.
- Applied: December 13, 1966
- Status date: June 25, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A13](https://openairdocs.org/tcds/2A13), [TCDS A3SO](https://openairdocs.org/tcds/A3SO)
- Certificate PDF: https://openairdocs.org/files/sha256/a1/7e/a17ee48e1f4d38da044d6ef9a8c84f5adf673b7ff8bfd9628ef8e088a14a35a6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C5BBF3CC3594A9A885256CC20056A3C7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA757SW

## ADs that name it (1)

- [AD 70-15-18](https://openairdocs.org/ad/70-15-18): Automatic Pilot and Automatic Aileron Stabilizer Instruments · Mitchell Industries Auto Pilot Systems Instruments. Effective Aug 31, 1970. Cited in the text

## Approved models (6)

- The New Piper Aircraft Inc. PA-28-140 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-150 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-160 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-180 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-235 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-32-260 ([TCDS A3SO](https://openairdocs.org/tcds/A3SO))

## 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.

Bepartment of transportation—federal atriation administration Supplemental t^pe Certificate SA757SW Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 ^wJA&^e>fl£0uftvw/*"«^ J^^ Civil Air *SIL£G4l&X£il£>- 2A13, A3SO Piper PA-28-140, -150, -160, -180, -235 ', PA-32-26Q Installation of Mitchell Automatic Flight System Model AK234 consisting of Century II Autopilot with optional Radio Coupler according to Mitchell Bulletin No, 343, Revision 3, dated 5-5-72. Installation of Mitchell Radio Coupler Model 1C388-3 per Bulletin No. 611, Revision 1, dated 4^-1 6W74 and Master Drawing List No. 87A7Q8 Revision A, dated 4-16^74.

FAA Approved Mitchell Industries, Inc. Placard 13A344-234 required when Century II autopilot is installed in Piper Models. PA-28r-235 and PA-32-26Q.

FAA Approved Mitchell Industries, Inc. Placard 13A344-234r-l required when Century II autopilot is installed in Piper Models PA-28r-140, -150, «-160, and -180.

FAA Approved Autopilot Flight Manual Supplement, P/N 68S168, dated 4-16-74, is required for Mitchell Radio Coupler Model 1C388*3.

modifications : December 13, 1966 February 13, 1967 4-16-74; 6-25T-84, Revision 2 *# 4/it •^'t CDon P. Watson (S>g™">") "-'-"- Manager, Aircraft Certificatiojn Division Southwest Region (Title)

FAAFotM 8110-2 (10-61)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and ttrcet) (City, State, and £IP code) from (Name of grantor) (Print or type) (Address of grantor) linlkfr and street j f O/r. Slnif. and ^jr code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 25, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a1/7e/a17ee48e1f4d38da044d6ef9a8c84f5adf673b7ff8bfd9628ef8e088a14a35a6)

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