NTSB: Unexpected Vibrations Caused Bell 525 Inflight Breakup

Credit: Bell 525: Bell Helicopter
LONDON—Unexpected severe vibrations generated during one-engine inoperative (OEI) flight trials of Bell’s fly-by-wire Model 525 helicopter caused the fatal crash of the first prototype, the NTSB has concluded. The severe vibrations resulted in unintentional control inputs—known as biomechanical...
Tony Osborne

Based in London, Tony covers European defense programs. Prior to joining Aviation Week in November 2012, Tony was at Shephard Media Group where he was deputy editor for Rotorhub and Defence Helicopter magazines.

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