# STC SR02526CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Donaldson Company Inc., United States
- Description: Installation of an Inlet Barrier Filter (IBF) System
- Applied: October 12, 2006
- Status date: November 13, 2017
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H19NM](https://openairdocs.org/tcds/H19NM)
- Certificate PDF: https://openairdocs.org/files/sha256/fc/97/fc97bf1e47c06d4d3445d5cb528da0369fbcaa98f6d229b8e17f3090eab90ec5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0DF71831158C69D68625889A0022B8DA.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR02526CH

## ADs that name it (0)

None.

## Approved models (1)

- MD Helicopter Inc. MD900 ([TCDS H19NM](https://openairdocs.org/tcds/H19NM))

## 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.

SR02526CH Donaldson Company, Inc.

17891 Chesterfield Airport Road Chesterfield, Missouri 63005

27 Federal Aviation See Type Certificate Data Sheet H19NM for complete certification basis.

H19NM MD Helicopter, Inc.

: MD900 Installation of an Inlet Barrier Filter (IBF) System in accordance with Donaldson Company, Inc.

Installation- IBF System Drawing No. 114001, Revision B, dated September 24, 2007, or later FAA approved revision.

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

2. FAA Approved Aircraft Flight Manual Supplement, AFS-MD900-IBF-FMS, Revision IR, approved on December 17, 2007, or later FAA approved revision, is required.

3. Instructions for Continued Airworthiness, AFS-MD900-IBF-ICA, Revision IR, dated October 20, 2006 or later FAA Approved revision is required.

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

...End...

October 12, 2006

December 20, 2007 February 21, 2017, November 13, 2017 Roy E. Boffo III (Signature) Manager, Propulsion & Program Management Section Chicago ACO Branch

## Every issue (2)

- November 13, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fc/97/fc97bf1e47c06d4d3445d5cb528da0369fbcaa98f6d229b8e17f3090eab90ec5)
- December 20, 2007: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/08/02/0802e3faff0f627478a11100ee5d39767ceb7f2138186ee942e388a65de259a9)

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