# STC SH3174SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bell Helicopter Textron Inc., United States
- Description: Fabrication and installation of a Frahm vibration absorber.
- Applied: May 23, 1991
- Status date: November 26, 2012
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/5d/4d/5d4d7b41121b52d86d83d99b1a655c42fdd8ff1c9037acf197ae370b2c024840
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F3456F23B38560DE86257BB30063B2CA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH3174SO

## ADs that name it (0)

None.

## Approved models (3)

- Bell Helicopter Textron Inc. 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))

## 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.

N umber SH3174SO This certificate issued to

Part 7 of the Civil Air R egulations .

Original Product -- Type Certificate N umber :

Fabrication and installation of a Frahm Vibration Absorber in accordance with Aeronautical Accessories, Inc. Drawing List, Report No. AA-91053, Revision A, dated February 3, 1992, or later FAA approved revision.

The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

Bell Helicopter Textron, Inc.

441 Industrial Park Road Piney Flats, TN 37686 H1SW M ake : Bell Helicopter Textron, Inc.

M odel : 205A, 205A-1, 205B Date of application : May 23, 1991

Date of issuance : March 16, 1992

Date reissued : November 26, 2012

Date amended : April 1, 1992;

November 6, 1992

B y direction of the A dministrator

(Signature) Scott A. Horn, Acting Manager, Rotorcraft Certification Office, Southwest Region

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

## Every issue (1)

- November 26, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5d/4d/5d4d7b41121b52d86d83d99b1a655c42fdd8ff1c9037acf197ae370b2c024840)

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