Contributing to the accident, the NTSB found,
was Gulfstream's pursuit of an aggressive flight
test schedule without ensuring that the roles
and responsibilities of team members were
appropriately defined, sufficient technical
planning and oversight was performed, and that
hazards had been fully identified and addressed
with appropriate, effective risk controls.
"In this investigation we saw an aggressive test
flight schedule and pressure to get the aircraft
certified," said NTSB Chairman Deborah A.P.
Hersman. "Deadlines are essential motivators,
but safety must always trump schedule."
At approximately 9:34 a.m. Mountain Time, during
takeoff on the accident flight, the G-650
experienced a right wing stall, causing the
airplane to roll to the right with the right
wingtip contacting the runway. The airplane then
departed the runway, impacting a concrete
structure and an airport weather station,
resulting in extensive structural damage and a
post-crash fire. The two pilots and two flight
engineers on board were killed and the airplane
was substantially damaged.