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

It could take months to fully understand what went wrong in the crash, the first involving a Dreamliner. Officials from India continued the investigation Friday.

An Air India Boeing 787 Dreamliner crashed shortly after takeoff from Ahmedabad on Thursday, killing most of the 242 people on board. The government has now ordered heightened surveillance of all Boeing 787 aircraft operating in India.

Samir Kumar Sinha, Secretary of the Ministry of Civil Aviation, says 'On 12th June around 2PM, we received the information that the plane going from Ahmedabad to Gatwick London had crashed. We immediately got detailed information about this through ATC Ahmedabad.

The event, which runs from June 16 to June 20, is the industry's largest trade show, where many aircraft orders are typically placed by airlines.

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,

NEW DELHI (Reuters) -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, a source with direct knowledge told Reuters on Friday.