He said experts from both Boeing and Rolls Royce were assisting the investigation and that the last transmission received from the engines was at 1.07am on Saturday morning.
Flight 706's acknowledgement of this instruction was the last radio transmission received from the aircraft.
Flight 663's radioed good night at 6 25 p.m. was the last transmission received from the flight.
An area of about 4,000 sq miles was scanned for the "very well-equipped" vessel's two personal location GPS beacons until no further transmissions were received from the small devices, which have a short battery life.
The US coastguard, Canadian aircraft and three merchant vessels searched for them throughout Friday and Saturday, with some 4,000 square miles previously scanned for the vessel's two personal-location GPS beacons until no more transmissions were received from the small devices, which have a short battery life.
Transmissions were received from 37 of the 40 PATs that were applied to blue sharks off the eastern coast of Canada between 2004 and 2007.
Data transmissions were received from 4 of the 6 systems over the winter months (Table 1).
All cultures taken from the donor and the graft were without growth (although this did not exclude the graft as the source of infection), and no reports of disease transmission were received from any other recipients of organs from this donor.
"In particular, the investigation will seek to determine why a situation arose that led to both the helicopter's engines flaming out when 76 kg of fuel remained in the fuel tank group, why no emergency radio transmission was received from the pilot and why, following the double engine failure, an autorotative descent and flare recovery was not achieved.
Upon penetration of the hurricane's eyewall at an altitude of 700 ft (200 m), a final transmission was received from the reconnaissance flight before it presumably crashed in the Caribbean Sea.
Takashi Kubota, JAXA program manager, said they are now analyzing the last transmissions of data received from the craft for clues as to what might have happened.
