Why would both engines of a state-of-the-art Boeing 787 Dreamliner lose power just seconds after takeoff, when everything appears to be okay? This is now the focus of an international investigation, after the disastrous crash of Air India Flight 171 on June 12,

Air India said on Tuesday it has completed precautionary inspections of the fuel control switch locking mechanism on all its Boeing 787 and 737 aircraft, with no issues detected. The probe into the Air India crash that killed 241 of the 242 people on board and 19 on the ground is focused on the fuel control switches of the Boeing 787 jetliner,