# STC SR09421RC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Donaldson Company Inc., United States
- Description: Installation of Inlet Barrier Filter system
- Applied: February 25, 2004
- Status date: November 21, 2017
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/e9/f8/e9f88924706c5ab7ab5d9b7ee265580c441ae294956c5c834fa5adf266f621ca
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D1D7D455998F35648625889A0023C612.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR09421RC

## ADs that name it (0)

None.

## Approved models (3)

- 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.

SR09421RC Donaldson Company, Inc.

17891 Chesterfield Airport Road Chesterfield, MO 63005

27 Federal Aviation (See Type Certificate Data Sheet No. H2SW for complete certification basis).

H2SW

Bell Helicopter Textron Canada Limited

206L-1, 206L-3 and 206L-4

Installation of Inlet Barrier Filter system in accordance with Donaldson Company, Inc. Drawing 106000 -020, Revision A, dated February 2, 2013, or later FAA approved revision. (Note: Installation may also be performed in accordance with earlier documents AFS Drawing Number 106000, Revision B, dated June 17, 2004, or later FAA approved revision and installation procedures AFS-BH206L3L4-IBF-KIT-IP, Initial Release dated August 16, 2004, or later FAA approved revision.)

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

2. FAA Approved Aircraft Flight Manual Supplement, AFS -BH206L3L4-IBF-KIT-FMS, Revision B, dated September 22, 2005, or later FAA Approved revision is required.

3. Instructions for Continued Airworthiness, AFS -BH206L3L4-IBF-KIT-ICA, Revision IR, dated August 20, 2004, or later FAA accepted revision is required.

4. If the holder agrees to permit another person to use this certificate to alter the product, the holder shal l give the other person written evidence of that permission.

5. Bell Helicopter Model 206L -1 must be modified IAW STC SH269NM Air Services International installation of Rolls Royce 250 - C30P engine or Bell Helicopter Textron’s Service Instruction for engine u pgrade document number BHT -206-SI-2050 to be eligible for this STC installation.

…End… February 25, 2004

August 25, 2004 November 21, 2017 May 8, 2013

Roy E. Boffo III (Signature) Manager, Propulsion & Program Management Section Chicago ACO Branch

(Title)

## Every issue (4)

- November 21, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e9/f8/e9f88924706c5ab7ab5d9b7ee265580c441ae294956c5c834fa5adf266f621ca)
- May 8, 2013: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/09/fd/09fd9ecf0c14358ef927e9659ca403d3d960549e7baf4fd2ce8a7f950db879cc)
- September 23, 2005: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/b8/d4/b8d491889e21ed46a81a4db31c1bb14f03dd9ba5b8dfabe4ad2286fd3a4f180c)
- August 25, 2004: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/39/f8/39f8dd4da9f8abe1e2f5801887883d78d28d48880a2566fb96b1330c13c10102)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.