New Delhi, Oct. 6 -- A British Airways flight bound for Chicago from London was forced to turn back on Monday (local time), about an hour after takeoff, after the aircraft made a dramatic descent of more than 28,000 feet within minutes. The pilots declared an emergency before returning safely to Heathrow Airport.

The incident involving the Boeing 777-200ER is the latest in a series of mid-air emergencies and accidents involving Boeing aircraft this year.

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According to media reports, the Boeing 777-200ER was scheduled to complete the journey to Chicago's O'Hare International Airport in about eight hours and 40 minutes. Around an hour after departure, however, the aircraft reached an altitude of 37,000 feet before apparently developing ...