The Accident Investigation Bureau (AIB) has released the final reports of on four accidents that occurred within the Nigerian airspace. The reports are already uploaded to the agency’s website: www.aib.gov.ng The final reports include that of Beechcraft 1900D with registration 5N- JAH belonging to Wings Aviation Services Air, Cessna Citation 560XLS with registration 5N-BMM belonging to Bristow Helicopters, Boeing 737-500 with registration 5N-BLE belonging to Aero Contractors and AS 350 B2 with registration 5N-BHU belonging to OAS Limited . Dr Felix Abali , Commissioner/CEO said :"At the Accident Investigation Bureau we are committed to enhancing aviation safety by conducting thorough and unbiased investigations into aircraft accidents and serious incidents. We are currently working hard to release more accident reports in the shortest possible time." The Beech 1900D registered as 5N-JAH and operated by Wings Aviation Limited as flight