Brazil's ANAC Certifies AFS Inlet Barrier Filter for Eurocopter AS350 Helicopter

St. Louis, Mo., 14 APRIL 2010 ¡V Aerospace Filtration Systems, Inc. (AFS), a wholly owned subsidiary of Donaldson Company, Inc. (NYSE:DCI) and a division of the Aerospace and Defense Group, has received a Supplemental Type Certificates (STC) from Brazil's National Civil Aviation Authority (ANAC) for an Inlet Barrier Filter (IBF) system for the Eurocopter AS350 series helicopters. Included in this approval are the AS350B3 (Single Hydraulic), the AS350B2, AS350B1, AS350BA and AS350B.

Donaldson IBF-equipped AS350 helicopters can freely operate with no engine inlet imposed flight or gross weight restrictions. The approved IBF Flight Manual Supplement allows operation to basic inlet and sand filter performance charts based on power check results. The new approval includes all Turbomeca Arriel AS350 models with the exception of the AS350B3 with dual hydraulic systems, which utilizes the Donaldson EC130 configuration system. Also included are Honeywell-powered models with Soloy or Heli-Lynx engine conversions.

The IBF system for the AS350 features an easily removed flat filter assembly with a 4,500 flight hour life and an integral bypass design, easily mounted on the existing cowl without troublesome alterations. A filter maintenance aid allows for on-condition status checks between established cleaning intervals, eliminating unnecessary service. No restrictions are imposed for flight in falling or blowing snow. With more than 3,000 Donaldson IBF kits in service worldwide, AS350 users will realize significantly better engine protection and performance than that offered by traditional AS350 sand filters or inertial particle separators.

Providing the most comprehensive line of IBF solutions, Donaldson Aerospace & Defense is the industry leader in the design, development and manufacture of high-performance engine IBF systems for commercial and military propulsion systems. Through their Donaldson St. Louis location, AFS provides certified IBF solutions for the following:

AgustaWestland A119 Koala, AW119Ke and AW139

Bell 205A1, 206B, 407, 206L-3/4, 206L-1(C30), 429 and 430

Eurocopter EC130, AS350 B/BA/B1/B2/B3, AS350¡¦s with Soloy or Heli-Lynx Honeywell engine conversions

MD Helicopters MD 369H Series, MD 500D/E/F and MD 900/902

IBF solutions for the AgustaWestland AW109 Power and Grand, Eurocopter EC135 as well as the Bell 206L are currently in development.

To learn more about the Donaldson Aerospace & Defense group, visit www.donaldson.aero or www.afs.donaldson.com.

About Donaldson Aerospace & Defense

Donaldson's Aerospace & Defense group is a leading worldwide provider of filtration systems for the aerospace and defense industry. Our filtration solutions protect fixed wing aircraft, rotorcraft, military ground vehicles, electronic equipment, space vehicles, missiles, military shipboard systems, and amphibious vehicles. We are committed to advancing filtration technology, providing quality products and prompt customer service. Our group serves customers from sales, engineering, and manufacturing locations around the world.

About Donaldson Company

Donaldson is a leading worldwide provider of filtration systems that improve people's lives, enhance our customers' equipment performance, and protect our environment. We are a technology-driven company committed to satisfying our customers' needs for filtration solutions through innovative research and development, application expertise, and global presence. Our employees contribute to the company's success by supporting our customers at our more than 100 sales, manufacturing, and distribution locations around the world. Donaldson is a member of the S&P MidCap 400 and Russell 1000 indices, and our shares trade on the NYSE under the symbol DCI. Additional information is available at www.donaldson.com.

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