Indian authorities have ordered what they called “extended surveillance” of all Boeing 787 aircraft in the country’s fleet while they investigate the cause of Thursday’s crash of an Air India plane.

Air India and Boeing are in the midst of significant turnarounds, but knowing the cause of the crash of Flight 171 will take a lengthy investigation.

Air India warns of delays as the DGCA orders mandatory safety checks on all Boeing 787s after a deadly Ahmedabad crash kills 265.

Air India warns of possible delays on long-haul flights as DGCA orders safety checks on Boeing 787s. Government mandates inspections after Ahmedabad crash; refunds or reschedules offered to passengers

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

Airbus SE said the fatal accident on Thursday in India involving a Boeing Co. airliner should spur the industry as a whole to advance its safety culture, dismissing the notion that the crash could bring a competitive edge to one planemaker over the other in the global duopoly.

The pilot of the London-bound Air India jet that crashed Thursday put out an urgent call as the Boeing 787-8 quickly lost altitude on takeoff. “Mayday ... no thrust, losing power, unable to lift,” Sumeet Sabharwal told traffic control less than a minute into the flight,

Air India and the Indian government are looking at several aspects of the Boeing 787-8 crash in Ahmedabad, including issues with the jet's engine thrust, its flaps, and why its landing gear remained open,