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.

An investigation into a deadly crash last month has focused on control switches that cut off fuel to an Air India Boeing jet after takeoff.