The black box contains the cockpit voice and the flight data recorders.
The Commissioner of the Accident Investigation Bureau, Felix Abali, made this known while displaying the two devices to aviation correspondents at the bureau’s headquarters in Lagos.
Six of the 12 people on the helicopter died when the crash occurred on Wednesday. Among the dead were the pilot and the co-pilot whose bodies were found on Thursday.
The cause of the crash is yet to be ascertained.