UK watchdog seeks Air India explanation after Dreamliner flew from London with possible fuel switch defect

Britain’s aviation authority has asked Air India to explain how a Boeing Dreamliner passenger jet which was grounded on arrival in India for safety checks took off from London on Sunday with a possibly faulty fuel switch, a letter shows.

The UK Civil Aviation Authority (CAA), in a letter to the airline dated Tuesday, warned of the possibility of regulatory action against Air India and its Boeing 787 fleet if the airline does not submit a complete response within a week.