Investors are looking for answers regarding the Air India Boeing 787 that crashed Thursday, killing more than 240 people.

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 the Air India crash.

The Turkish government has denied claims that its aviation firm Turkish Technic was responsible for the maintenance of the Air India Boeing 787-8 Dreamliner that crashed. The rebuttal comes amid strained India-Turkey relations and Air India’s decision to reduce reliance on Turkish MRO services.

The investigation into Air India flight 171 crash opens up questions into the many concerns surrounding Boeing's 787.

Last year, the F.A.A. said it was also investigating claims by a Boeing engineer that parts of the fuselage, or body, of the Dreamliner were improperly fastened together, which the whistle-blower said could cause premature damage to the plane over years of use.

The Air India flight, carrying 242 passengers and crew members, crashed shortly after takeoff from Ahmedabad, India, en route to London Gatwick.