Commissioner in charge of the Accident Investigation Bureau (AIB) Felix Abali disclosed this while giving an update on the incident to reporters in Lagos.
The Sikorsky S76 C helicopter, marked 5N-BQJ, belonging to Bristow Helicopters, enroute Lagos from an offshore location ditched into the ocean on Feb. 3.
All the 11 passengers on board, including two crew members, were rescued alive.
Abali said the bureau was determined to carry out a thorough investigation in order to unravel the cause of the incident and forestall future occurrence.
The commissioner said the representatives of the manufacturer of the aircraft were denied visas to Nigeria, saying this had delayed the AIB’s investigation into the incident.
According to him, the preliminary report on the investigation cannot be concluded without interacting with the Sikorsky representatives.
Abali told reporters that investigation would focus on the aircraft controls with avionics interface, while the crew, maintenance personnel and others relevant to the investigation would also be interviewed.
He said maintenance records, including Technical Logs would also be examined, adding that Bristow Helicopter was cooperating with AIB in this regard. Enditem