Further investigations is being carried out.
Last December’s chopper crash that killed former Governor of Kaduna State, Patrick Yakowa, and a former National Security Adviser, Andrew Azazi, was caused by human error, material failure, or both, investigators say.
The Nigerian Navy, whose Augusta copter was involved in the accident, said on Friday an interim report on the accident showed there was no sabotage as speculated.
The Navy said it received the report from the Accident Investigation Board (AIB) tasked by the service to assess the December 15 crash.
“The Investigation which was conducted by aviation experts in collaboration with the manufacturers – Agusta Westland — has stated that the cause of the crash could either be human error or material failure or a combination of both,” Naval spokesperson, Kabiru Aliyu, said.
More examination to determine the actual cause of the accident, was underway, Mr. Aliyu, a Commodore, said.
“However, to determine the actual cause of the crash, there would be the need to tear down the engine of the helicopter in order to carry out detailed forensic analysis. This aspect of the investigation will be carried out by Turbomeca, the manufacturers of the engine,” he said.
“It is important to emphasise that an independent police report has equally ruled out sabotage as a possible cause of the crash. Further information on the investigation would be made public when available.”
Messrs Azazi and Yakowa travelled on the helicopter on their way to Port Harcourt from Bayelsa State where they attended the funeral of the father of a special adviser to President Goodluck Jonathan, Oronto Douglas.