What happened
The incident occurred immediately following departure. While the aircraft was in the climb phase, it encountered active thunderstorm conditions. During this ascent, the plane went out of control. The loss of control led to a crash into the sea. All six crew members aboard were killed in the accident.
Findings
The source material indicates that the aircraft was operating within thunderstorm activity at the time it lost control. No further specific mechanical or human factors are detailed in the provided text beyond the environmental conditions and the resulting loss of control.