# STC SH7521SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bell Helicopter Textron Inc., United States
- Description: Installation of a logging/observation bubble window in the right side crew door.
- Applied: January 14, 1987
- Status date: August 14, 2012
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/ad/8a/ad8ae1800597672c8f52036707567a978f7d7077c20894b825f460ea6b9162ef
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E58AAB7ADC65476B86257AA70052EB62.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH7521SW

## ADs that name it (0)

None.

## Approved models (2)

- Bell Helicopter Textron Canada Limited 206A ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206B ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))

## 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.

Number SH7521SW This certificate issued to

Part 6 of the Civil Air Regulations.

Installation of a logging/observation bubble window in the right side crew door in accordance with Heli-Plex Drawing Number 26HP904, Revision A, dated June 1, 1987; or Heli-Plex Drawing No. 26HP929, Revision IR, dated March 15, 1989, or later FAA approved revision.

Heli-Plex, Inc. Flight Manual Supplement, dated December 6, 1988, or later FAA Approved RFMS is required with the Heli-Plex Logging Bubble Installation. 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 H2SW Make : Bell Helicopter Textron Canada Limited Model : 206A, 206B Date of application : January 14, 1987

Date of issuance : December 6, 1988

Date reissued : October 26, 1990;

August 14, 2012

Date amended : March 23, 1989, Rev. 1

( 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)

- August 14, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ad/8a/ad8ae1800597672c8f52036707567a978f7d7077c20894b825f460ea6b9162ef)

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