Was the Boeing 787-8 Dreamliner that crashed over Ahmedabad seconds after taking off airworthy? When was it overhauled and maintained last time? Was there any issue with the engine? These questions are being asked the pilot sent the Mayday signals immediately after the plane could take off.

Investigators believe the Boeing Dreamliner had its emergency-power generator operating during the Air India crash in Ahmedabad.

Air India flight AI171, a Boeing 787-8 carrying 242 people, crashed after taking off from Ahmedabad on its way to London.