From the NTSB Web Site:
WAS07WA013
On August 3, 2007 about 0735 UTC, 5N-BIQ, Bell 412 EP, operated by Bristow Helicopter (Nigeria) Ltd, crashed while manuevering over Qua Ibom Terminal Airfield (QUA) at Eket, Akwa Ibom State, Nigeria. The pilot, the sole occupant, was fatally injured. The helicopter was destroyed. There was no fire. The local flight originated at QUA.
Witnesses reported observing the helicopter in a series of "torque turns" over opposite ends of the airfield before it crashed in a nose-down attitude.