ARH Crash: Foreign Objects Blocked Fuel Flow

By James T. McKenna | March 29, 2007
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The federal investigation into the Feb. 21 crash of the Bell Helicopter/U.S. Army ARH-70A Armed Reconnaissance Helicopter prototype found that foreign objects blocked both check valves in the aircraft's fuel boost pump assembly. The U.S. National Transportation Safety Board said this cut off fuel flow to the Honeywell HTS900 engine, causing it to flame out. The resulting crash totaled the No. 4 prototype, further setting back a critical program to replace war-weary Army OH-58D Kiowa Warriors. The Army wanted the first ARH-70A unit in service by September 2008. That had slipped to December 2009 before the Army threatened to cancel Bell's contract unless the manufacturer can come up with a plan for salvaging the program.  For related newss


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