# STC SA3010SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system YK491 consisting of yaw damper system
- Applied: June 27, 1974
- Status date: August 1, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A20SO](https://openairdocs.org/tcds/A20SO)
- Certificate PDF: https://openairdocs.org/files/sha256/30/ec/30ec0704ceebe3f3b79ff582ab0713aa8e66683a5f37c5d78ac2ee0ea7499c29
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/064ADA63AE8A677E85256CC2000A92A7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3010SW-D

## ADs that name it (0)

None.

## Approved models (4)

- Piper Aircraft Inc. PA-31 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-300 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-325 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))
- Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO))

## 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.

Bepartmtnt of ^Transportation - f cdtral Stoiation administration Supplemental 'Cuje Certificate SA3010SW-D Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 3 , Civil Air iSlfat4£a&t>n&:

£k*a4na6 iJwfZued — — f a^ur^ A8EA Piper PA-31, PA-31-300, PA-31-325, PA-31-350 Installation of Mitchell Automatic Flight System Model YK491 consisting of Yaw Damper System according to Bulletin No. 615, dated 8-19-74. Revision 2 and Master Drawing List No. 87A716, Revision B, dated 8-19-74.

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S184-2, dated 9-27-74 is required.

modification, &:t>>m{ln^^^ 6-27-74 / — 1U— / 1| 8-16-74; 9-27-74; 8-1-84, Revision 3

•f^-'Don P. Watson 0 Manager, Aircraft Certification Division Southwest Region (THU)

Tfiu certificate may he tranifmed in accordance mitk f-AK 21.17.

FAAFcMu IIIO-I (10-61)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number_ to (Name of 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/sha256/30/ec/30ec0704ceebe3f3b79ff582ab0713aa8e66683a5f37c5d78ac2ee0ea7499c29)

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