The preliminary finding gives investigators a new line of inquiry as they study a crash that killed all but one of the plane’s passengers.

India's aviation safety watchdog said on Tuesday surveillance conducted on Air India's Boeing 787 fleet did not reveal any major safety concerns, days after one of its jets crashed, killing at least 271 people.

In response to heightened safety concerns, DGCA confirmed that comprehensive surveillance of Air India’s Boeing 787 Dreamliner fleet revealed no significant safety deviations.