# STC SA3172SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell Yaw Damper System Model YK631.
- Applied: December 10, 1976
- Status date: June 18, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/ce/a9/cea96d77e1ec1fc847bdff8404284f019fe63eba1371d88fcb2e4e9b1b334098
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E89B9480855B92E185256CC2000A94CC.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3172SW-D

## ADs that name it (0)

None.

## Approved models (10)

- Beechcraft Corporation H35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation J35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation K35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation M35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation N35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation P35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation S35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Beechcraft Corporation V35B ([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.

Bepartment of transportation—.federal 2toiation Administration Supplemental 'Cgpe Certificate i/lfau/a&tr \SUvrrwer' SA3172SW-D Century Flight Systems, Inc.

F.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 Civil Air 3A15 Beech H35, J35, K35, M35, N35, P35, S35, V35, V35A and V35B nae :

Installation of Mitchell Yaw Damper System Model YK631 according to Bulletin No. 758, Revision 4, dated 3-30-78 and Master Drawing List No. 87A897, Revision D, dated 3-30-78 (14 Volt System) and/or later FAA Approved revisions of the above data.

Also eligible on Beech Models S35, V35, V35A and V35B when Modified Per STC SA1035E (Turbocharged Engine) Pilot's Operating Handbook and FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S684, dated 3-3-78 is required for Beech Model H35 aircraft owners with a Pilot's Operating Handbook and FAA Approved Airplane Flight Manual, See Continuation Sheet, Page 2, a part? of this STC.

>reviously *PP-ved modifications 4(> 12-10-76 12—14—76 6-10-77; 12-7^-77; 3^3-78;

5-11-78; 6-18-84, Revision 5 Don P. WatSOn (Signature) Manager, Aircraft Certification Division Southwest Region (Tillt)

47.

**FAA FCMM SI 10-2 (10-68)**

United f&Bttt of 3atric9 Bepartmcnt of transportation— Jpokral atiiation administration Supplemental t^pe Certificater (Continuation &heet) SA3172SW-D, Rev, 5, dated 6-18-84 Limitations and Conditions (Cont'd);

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S685, dated 3-3-78 is required for Beech Model H35 aircraft owners with an Airplane Flight Manual .

Pilot's Operating Handbook and FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S550-2, dated 3-3-78 is required for Beech Models J35, K35, M35, N35, P35, S35, V35, V35A, V35B and Beech Models S35, V35, V35A, -and V35B When Modified in Accordance with STC SA1035WE (Turbocharged Engine) aircraft owners with a Pilot's Operating Handbook and FAA Approved Airplane Flight Manual.

FAA/DAS Approved Airplane Fltght Manual Supplement, P/N 68S488-3, da,ted 3-3-78 is required for Beech Models J35, K35, M35, N35, P35, S35, V35, V35A, V35B and Beech Models S35, V35, V35A and V35B When Modified in Accordance with STC SA1035WE (Turbocharged Engine) aircraft owners with an Airplane Flight Manual and/or later FAA Approved revisions of the above supplements.

FAA FORM eno-a-1 (1O-M) Thu ttttifcatt my bi trmuftrrtd in accordant with FAR 21.47.

.NSTRUCTIONS: The transfer endowment below may be u~d to notify ,he appropriate FAA Region., Office of the tramfer of thU Supplemental Type Certificate.

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

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee)_ (Address of transferee) __ from (Name of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- June 18, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ce/a9/cea96d77e1ec1fc847bdff8404284f019fe63eba1371d88fcb2e4e9b1b334098)

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