American Airlines flight #AA9600 from Barcelona to New York JFK is declaring an emergency and diverting.
Flight AA9600 from Barcelona to New York JFK is diverting to London Heathrow.
The Boeing 777 departed Barcelona more than 6 hours late at 14:45 CET.
The crew squawked 7700 (general emergency) due to a technical issue.
The plane (reg. N794AN) is a 23 years old Boeing 777-200ER.
As the plane took off few hours late, the crew may be running out of hours.
UPDATE 15:45 GMT
Flight #AA9600 is expected to land on runway 09L by 16:30 GMT at London Heathrow.
UPDATE 15:55 GMT
The crew is starting the descent from 36,000ft.
UPDATE 16:05 GMT
American Airlines is planning to resume the flight from Heathrow at 6.00 pm.