The investigation into the Air India plane crash that killed 270 people last month is focusing on the actions of the plane's pilots.
According to international media, citing sources familiar with initial assessments by US officials, no problems have been identified with the Boeing 787 Dreamliner so far.
The WSJ reports that preliminary findings indicate that switches controlling fuel flow to the plane's two engines were turned off, either intentionally or accidentally. Pilots use the switches to start the plane's engines, shut them down or reset them in certain emergency situations.
The switches are normally turned on during flight and it is unclear how or why they were turned off, the sources told the WSJ, adding that it is unclear whether the maneuver was accidental or intentional, or whether there was an attempt to turn them back on. Further clarity will come from the results of the investigation and examination of the black box: India's Air Accidents Investigation Bureau, which is leading the investigation, is expected to release a preliminary report as early as today, the WSJ writes.
If the switches were off, that could explain why the plane's emergency generator, known as a ram air turbine (RAT), appears to have activated moments before the plane crashed into a nearby medical student dormitory.
In total, 270 people died, including all but one person on board, who managed to walk away from the wreckage of the Boeing without injury.