# STC SA617SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system Model AK194 consisting of Century III auto-pilot with optional automatic pitch trim system, automatic aileron stabilizer and radio coupler.
- Applied: February 18, 1966
- Status date: June 25, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A16](https://openairdocs.org/tcds/3A16)
- Certificate PDF: https://openairdocs.org/files/sha256/a2/b5/a2b5009e5971a05933af665c5e26131de5388c91ec4890886cbf6df1cc92e7cd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9BF2D110F5B387EE85256CC200569ECA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA617SW

## 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 (9)

- Beechcraft Corporation 56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 95-55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 95-A55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 95-B55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 95-B55B ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation 95-C55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation A56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation D55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Beechcraft Corporation E55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))

## 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.

Btparcmtnt of'Cransportation-federal Stoiation administration Supplemental 'Cgpe Certificate SA617SW Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 vJ^jfy^deAAam^^Jfoe'fitMc'urtin&fiAwet^^ ^^ja^rt4Mfr^.i/n^M'/>>eaM*rfvn^^^^i/4tr^ 3 . <*dZb' Civil Air Griatmit *Jf*>cute6 —— ^^^i^'&e>f^uKfa/e'^/Kwfn-c«^- : 3A16 95-55, 95-A55, 95-B55, 95-B55B 95-C55, D55, E55, 56TC, A56TC rva& :

Installation of Mitchell Automatic Flight System Model AK194 consisting of Century III Autopilot with Optional Automatic Pitch Trim System, Automatic Aileron Stabilizer and Radio Coupler according to Bulletin No. 311, Revision 10, dated 2-25-72; Installation of Mitchell Glide Slope Coupler Model 1C493, according to Bulletin No. 369, dated 11-6-67; Installation of Mitchell Radio Coupler Model 1C388-3 according to Bulletin No. 611, Revision 1, dated 4-16-74 and Master Drawing List No. 87A708, Revision A, dated 4-16-74.

See Continuation Sheet, Page 2, a part of this STC, -u/ 4-27-67; 2-9-68; 6-30-70;

. February 18, 1966 L/,,&~mw</: 10-2-70; 4-16-74; 6-25-84, Revision 6 March 9, 1966 ^/^ Don P. Watson (S>g«°'<»<) Manager, Aircraft Certification Division Southwest Region (Title) Any alteration ofthis certificate w punishable by a fine of not exceeding tl ,000, or imprisonment not exceeding 3 years, or both.

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

FAA FotM a 110-2 (10-68)

ttifted SStaxa of aatrica Bcpartmtnt of transportation— Jpetaal ablation administration Supplemental ICgpe Certificate(Continuation 3hcet) SA617SW, dated 6-25-84, Revision 6 LIMITATIONS AND CONDITIONS:

The following FAA Approved Placards are required:

1. P/N 13A329-194 for Beech Models 95-C55, D55 and E55

2. P/N 13A329-194-1 for Beech Models 95-55, 95-A55, 95-B55, 95-B55B

3. P/N 13A329-194-2 for Beech Models 56TC and A56TC with Century III

4. P/N 13A322-194 for Beech Models 95-C55, D55 & E55

5. P/N 13A322-194-1 for Beech Models 95-55, 95-A55, 95-B55, 95-B55B

6. P/N 13A343-194-2 for Beech Models 56TC and A56TC with Stabilizer

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

FAA FORM 8110-2-1 (10-89) Tlut urtifcoU auy ** transjiTrut in accordant with FAR 21.47.

**PAGE 2OF 2PAGES**

The FAA will reiuue the cenificale in the name of (he transferee and forward i( to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number .

to (Name of transferee) (Address of transferee) ( Mumttr mJ ttrtit) (City. Slatt. mnd ^IP mlt I from (Name of grantor) (Print or type) . —__—_— (Address of grantor) (Xumbtr mxJ ttrtttj Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

, ,, < r. 9 n i«n«-««»-OV>

## Every issue (1)

- June 25, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a2/b5/a2b5009e5971a05933af665c5e26131de5388c91ec4890886cbf6df1cc92e7cd)

---
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.