On March 22, 1998, a Hughes 369E (registration N5245P) was involved in an aviation accident near Seattle, WA. Investigators recorded the probable cause as: Loss of engine power due to a restricted fuel system filter. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A helicopter experienced a loss of power during a normal approach, resulting in a hard landing. Post-incident inspection revealed a restricted airframe-mounted anti-ice fuel filter and an inoperative bypass switch.
Incident Description
The pilot reported that the approach was proceeding normally until the helicopter reached about 30 feet above the ground on short final, at which point a loss of power occurred. The subsequent landing was hard. After the landing, the engine was still running, and the pilot shut it down.
Post-Accident Inspection
Pressure and vacuum checks were performed on the engine fuel system, after which the engine was run successfully. During reassembly of the helicopter, the airframe-mounted anti-ice fuel filter element was found to be restricted, and the bypass switch was inoperative.
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