WOOD DALE, ILLINOIS (May 12, 2008) - AAR CORP. (NYSE: AIR) today announced that AAR SUMMA Technology has earned recognition as a Partner-level supplier for 2008 in the John Deere Achieving Excellence Program. The Partner-level status is Deere & Company's highest supplier rating. AAR SUMMA Technology's facility in Lebanon, Kentucky was selected for the honor in recognition of its dedication to providing products and service of outstanding quality as well as its commitment to continuous improvement. Company employees accepted the recognition during a ceremony held on February 19, 2008 in Davenport, Iowa.

AAR SUMMA Technology is a supplier of axles and other critical tractor components to John Deere's operation in Greenville, Tenn.

"We strive to provide our customers with quality precision-manufactured components and consistently high levels of customer service," said Terry Stinson, group vice president of AAR's Structures and Systems Division. "The excellent performance and this prestigious recognition from such a valued customer serve as testaments to the great team we have in place at AAR SUMMA Technology."

Suppliers who participate in the Achieving Excellence program are evaluated annually in several key performance categories, including quality, cost management, delivery, technical support and wavelength, which is a measure of responsiveness. John Deere Supply Management created the program in 1991 to provide a supplier evaluation and feedback process that promotes continuous improvement.

AAR acquired SUMMA Technology in December 2007 as part of the Company's strategy to broaden its product offerings, diversify is customer base and expand in to new markets. AAR SUMMA Technology currently provides precision machining, fabrication, welding and engineering services in support of F-35, F-22, F-16, F-18, C-130 and Gulfstream Aircraft, the Expeditionary Fighting Vehicle (EFV) and various missile, space and commercial programs.

AAR SUMMA Technology operates as part of AAR's Structures and Systems segment, which accounts for 27 percent of the Company's sales. AAR is a leading provider of products and value-added services to the worldwide aviation and defense industry. With facilities and sales locations around the world, AAR uses its close-to-the-customer business model to serve airline and defense customers through four operating segments: Aviation Supply Chain; Maintenance, Repair and Overhaul; Structures and Systems and Aircraft Sales and Leasing. More information can be found at www.aarcorp.com.

AAR is a leading provider of products and value-added services to the worldwide aerospace and defense industry. With facilities and sales locations around the world, AAR uses its close-to-the-customer business model to serve aviation and defense customers through four operating segments: Aviation Supply Chain; Maintenance, Repair & Overhaul; Structures & Systems and Aircraft Sales & Leasing. More information can be found at www.aarcorp.com.

This press release contains certain statements relating to future results, which are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on beliefs of Company management, as well as assumptions and estimates based on information currently available to the Company, and are subject to certain risks and uncertainties that could cause actual results to differ materially from historical results or those anticipated, including those factors discussed under Item 1A, entitled "Risk Factors", included in the Company's May 31, 2007 Form 10-K. Should one or more of these risks or uncertainties materialize adversely, or should underlying assumptions or estimates prove incorrect, actual results may vary materially from those described. These events and uncertainties are difficult or impossible to predict accurately and many are beyond the Company's control. The Company assumes no obligation to publicly release the result of any revisions that may be made to any forward-looking statements to reflect events or circumstances after the date of such statements or to reflect the occurrence of anticipated or unanticipated events. For additional information, see the comments included in AAR's filings with the Securities and Exchange Commission.