Hong Kong Cathay Pacific flight CX840 was originally scheduled to go to New York, USA, Hong Kong International Airport. During the flight, it was suspected of encountering emergencies and transferred to Tokyo Haneda Airport, Japan.

Comprehensive Hong Kong 01 and Sing Tao.com reported that according to the flight dynamic website Flightradar24 and the website of the Hong Kong Airport AdministrationDeparting at about 5:30 pm on the same day, it is expected to arrive at Kennedy Airport at 8:35 pm on October 5th local time on October 5th, but return to Sapporo at high altitude, and arrive at around 1:40 am on October 6, local time in Tokyo, Japan.Haneda Airport, the flight time is about seven hours, and it still fails to take off again.

Flight CX840 involved in the air bus A350 passenger plane.

CX383 flight from Hong Kong to Zurich also used A350 passenger aircraft. On September 2, the flight aircraft engine was on fire. After taking off for about one hour, the pilot once reported the emergency.Cathay Pacific announced on the same day that a total of 48 A350 passenger planes were found in the fleet. Some engine parts were found to fail to stop the detection and maintenance in real time. On September 4th, it was confirmed that 15 of them needed to replace the engine oil pipe.On September 7th, Cathay Pacific refers to the ideal progress of the A350 operating fleet of its A350, and has been completed and put into service as planned.