A Boeing 777 belonging to American Airlines with registration number N795AN was travelling from Chicago to Tokyo Narita airport (Flight name : AA-153). The plane sufered loss of the center hydraulic system fluid. The crew immediately diverted to Anchorage where they landed safely.
A replacement Boeing 777 (N794AN) was prepared for the passengers. The flight continued with a delay of 15 hours/
Maintenance identified a leaking hydraulic pressure transducer as cause of the problem and replaced the transducer. The incident aircraft is bound to position back to Dallas Ft. Worth, delivering the mechanics home, as flight AA-9628.