# STC SA3025SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Automatic flight system model AK497 consisting of Century IIB autopilot with optional radio coupler.
- Applied: September 23, 1974
- Status date: August 1, 1984
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/2e/46/2e46b5767343b98850dc57fa48f6cfc5af131b183a61a14939f9ca847f362b28
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A0890E559262DA085256CC2000A92D6.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3025SW-D

## ADs that name it (0)

None.

## Approved models (14)

- Beechcraft Corporation 35-33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-A33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-B33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-C33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 35-C33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation 36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation A36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation E33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation F33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation G33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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.

Btpartmtnt of transportation federal Sloiation SUmmiBtratton Supplemental Itgpe Certificate SA3025SW-D -*4**«J&- Century Flight Systems, Inc.

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

•dtfx'£h. jA^&rrii£a&4'rtA-ji0if&*tfndUii>?tA' tajttfem&n'j/fji'r -> &if. Civil Air iSleat4£a£t>nA'.

£J*ijut0ia# Zfecefttc^ —— ,styfif-<A£*d&ca&-t-'t.U'rrdie>r-: 3A15 Beech 35-A33, 35-B33, 35-C33, 35C33A, E33, E33A, E33C, F33, F33A, F33C, G33, 36, A36 and 35-33* n&& :

Installation of Mitchell Automatic Flight System, Model AK497, consisting of Century IIB Autopilot with Optional Radio Coupler according to Bulletin No. 620, Revision 3, dated 1-14-76 and Master Drawing List No. 87A710, Revision C, dated 1-^-14^76.

*Eligible only on 35-33 Models with wing rib assembly P/N 35-115079-604 instead of P/N 35-115079-SA2.

The following FAA/DAS Approved Airplane Flight Manual Supplements are required;

P/N 68S246, dated 6-30-75 for Beech Model A36. P/N 68S247, dated 6-30-75 for Beech Model 35-C33A, E33A, E33C, F33A, F33C and G33. P/N 68S248-1, dated 1-26-76 for Beech Model 35-33, 35-A33, 35-B33, 35-C33, E33 and F33. FAA/DAS Approved Autopilot Flight Manual P/^J 68S268. dated 6-30-75 for Beech Model 36.

^sr^j jiL?phe B^f&ns/?? rer, *~*^j y*™*-^*^' • . t * - . - f . t. 'fsfemafsn, vrt,^jkrf Avn/jt'Aur- </M* 6-30-75; 1-26-76; 8-1-84, Revision 3 ' ~Watsor Manager, Aircraft Certification Division Southwest Region Any alteration o/fAi'j certificate H punishable by a fine of not exceeding tl,000, or imprisonment not rxctfdiag 3yta>$> Q' both.

Ttiii crrtificale may bt Iramfrrrtd tn accoidanir with f-AK 21.47.

INSTRUCTIONS: Tha transfer endorsement below may be used to notify the appropriate FAA Regional Office of tha transfer of the Supplemental Type Certificate.

The FAA will raiasue tha certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name or" transferee,) (Address of" transferee) (Number and street) (City, State, and ZIP coda) from (Name of grantor)(Print or type) (Address of grantor) (Number £ street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink)

## Every issue (1)

- August 1, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2e/46/2e46b5767343b98850dc57fa48f6cfc5af131b183a61a14939f9ca847f362b28)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.