# STC SR00539AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Bell Helicopter Textron Inc., United States
- Description: Replace drive train seals with modified seals.
- Applied: August 12, 1993
- Status date: February 16, 2012
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/a5/12/a5125bb348529e0e176388f6e038cde77b729869d1b51693de217e0997ce806b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F55B7BDF45F4889986257AA7004FB930.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00539AT

## ADs that name it (0)

None.

## Approved models (6)

- 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))
- Bell Helicopter Textron Canada Limited 206L ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-1 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-3 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-4 ([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 SR00539AT This certificate issued to

Part 6 of the Civil Air Regulations.

Replace drive train seals with modified seals in accordance with Aeronautical Accessories, Inc. Report No. AA-94006, Rev. B, dated October 28, 1994, “Installation/Maintenance Instructions for Tailrotor Gearbox Input Seal Kit”, or Report No. AA-94085, No Rev., dated October 28, 1994, “Installation/Maintenance Instructions for Freewheeling Front Cap Seal Kit”, or Report No. AA-94086, No. Rev., dated October 28, 1994, “Installation/Maintenance Instructions for Freewheeling Rear Housing Seal Kit” or later FAA approved revision.

Bell Helicopter Textron, Inc.

441 Industrial Park Road Piney Flats, TN 37686 H2SW Make : Bell Helicopter Textron Canada Limited Model : 206A, B, L, L-1, L-3 and L-4 Date of application : August 12, 1993

Date of issuance : July 13, 1995

Date reissued : February 16, 2012

Date amended : November 23, 1994

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

( Title)

FAA Form 8110-2-1(10-69) Page 2 of 3

FAA Form 8110-2-1(10-69) Page 3 of 3

Number SR00539AT Date of Issuance: July 13, 1995 Date Amended: November 23, 1994 Date of Reissuance: February 16, 2012

This approval of this change in type design is restricted to the helicopters identified above only. 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. A copy of this STC must be included in the permanent records of each helicopter when it is modified in accordance with this STC.

-END-

## Every issue (1)

- February 16, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a5/12/a5125bb348529e0e176388f6e038cde77b729869d1b51693de217e0997ce806b)

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