# STC SR00531NY

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Alpine Aerotech Ltd, Canada
- Description: Installation of stiffeners to the firewall assembly.
- Applied: June 29, 1996
- Status date: January 13, 2006
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 29
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/37/c4/37c4cca9b947f322f0a4491c55a254065ee5984b8be3b321a13e01c64e2e9413
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E5001F785352CD888625710700536302.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00531NY

## ADs that name it (0)

None.

## Approved models (4)

- Bell Helicopter Textron 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 412CF ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 412EP ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

## 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.

1260 Industrial Road Kelowna, B.C.

Canada, V1Z 1G5

Part 29 of the Federal Aviation Regulations.

H4SW

Bell Helicopter Textron

212, 412, 412CF, 412EP Original Product -- Type Certificate Number Make :

Installation of stiffeners to the firewall assembly in accordance with Alpine Aerotech, Ltd. Installation Instructions, Document No.

191M-96-028-II, Rev. B, Transport Canada approved August 25, 2005, or later Transport Canada approved revisions.

Limitations and Conditions

1. Maintenance to be performed in accordance with Alpine Aerotech, Ltd. Document No. 191M-96-028-MMS, Rev. NI, Transport Canada accepted August 25, 2005, or later Transport Canada accepted revisions.

2. Compatibility of this design change with previously approved modifications must be determined by the installer.

3. If the holder agrees to permit another person to use the certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application : June 29, 1996

Date of issuance : December 5, 1996 Date reissued :

Date amended : January 13, 2006

( Signature) Anthony Socias Manager New York Aircraft Certification Office

(Title)

## Every issue (1)

- January 13, 2006: Amended, Current. [certificate](https://openairdocs.org/files/sha256/37/c4/37c4cca9b947f322f0a4491c55a254065ee5984b8be3b321a13e01c64e2e9413)

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