NTSB Investigates Fatal Business Jet Pitching Incident and Flight Problems.

A business jet flying over New England violently pitched upward then downward, fatally injuring a passenger, after pilots responding to automated cockpit warnings switched off a system that helps keep the aircraft stable, US transportation investigators reported Friday. The National Transportation Safety Board didn’t reach any conclusions in its preliminary report on the main cause of the deadly March 3 accident, but it described a series of things that went wrong before and after the plane swooped out of control. The trim system of the Bombardier Challenger 300 twin-engine jet was the subject of a Federal Aviation Administration mandate last year that pilots conduct extra safety checks before flights.