The British regulator has reportedly sought an explanation on how a 787 took off from London with a possibly faulty fuel switch The UK has warned Air India of regulatory action following an incident in which one of its Boeing 787 Dreamliner passenger jets was grounded after landing in India from London for safety checks, Reuters reported on Wednesday. In a letter to the airline on Tuesday, the UK Civil Aviation Authority (CAA) sought an explanation on how the aircraft flew to Bengaluru with a