Owners of an estimated 737 Diamond DA40 aircraft (various models) in the U.S. registry will need to inspect their fuel tanks for the deteriorated remains of a rubber fuel hose, according to an airworthiness directive published July 15, effective August 4.
The FAA invited public comment on the AD, which allows up to 100 flight hours after August 4 to complete the required inspection and replace the fuel hoses. The AD applies to Diamond Aircraft Industries models DA40, DA40F, and DA40NG airplanes, and addresses an unsafe condition—deterioration of the rubber fuel tank connection hoses—that could restrict fuel flow and starve the engine.
The DA40 trainer first flew in 1997 and remains a popular training aircraft, with 2019 sales matching those of Textron Aviation’s Cessna Skyhawk, according to data from the General Aviation Manufacturers Association.
Comments on this AD may be submitted online or by mail to: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. Written comments sent by mail should reference the docket FAA-2020-0644