February 16, 2025
Cathay Pacific A350 Boston-Hong Kong Declares Emergency

Cathay Pacific A350 Boston-Hong Kong Declares Emergency

Cathay Pacific flight CX811, an A350-1000 bound for Hong Kong (HKG), has declared an emergency shortly after takeoff from Boston (BOS).
Riik@mctr, CC BY-SA 2.0, via Wikimedia Commons

A Cathay Pacific A350-1000 departing for Hong Kong has declared an emergency, squawking code 7700 shortly after takeoff from Boston Logan International Airport.

Cathay Pacific flight CX811, an Airbus A350-1000 bound for Hong Kong International Airport, is now holding off the coast of Boston after declaring a general emergency.

Cathay Pacific CX811 Boston-Hong Kong


Flight CX811 declared the emergency while passing through 5,000 feet just after takeoff. Flight crew then terminated the climb and entered holding procedures offshore at that altitude.

The nature of the emergency is not yet known.

Flight track of Cathay Pacific CX811 showing holding procedure offshore from Boston.

0800 UTC: Holding Near Boston


Cathay Pacific flight CX811 had made a delayed departure out of Boston Logan International Airport earlier today. Flight data shows the aircraft logged an actual time of departure of 0204 local time. Scheduled departure time for the service was listed as 0030 local time.

The flight continues to hold offshore for fuel dumping at 5,000 feet.

Flight track of Cathay Pacific CX811 showing holding procedure offshore from Boston.

0810 UTC: Approach to Boston (BOS)

After a briefing holding period offshore, flight CX811 has exited the holding pattern and is now on descent for a return to Boston Logan (BOS).

Flight track of Cathay Pacific CX811 showing return to Boston.

Weather for the flight’s return is current instrument conditions (IFR) with visibility 1.5 miles and 2,400 foot cloudbase. Winds are 20-29kts from 310°.

the aircraft conducting today’s CX811 service to Hong Kong is an Airbus A350-1000 widebody, registered B-LXM. This is a 4.5 year old widebody aircraft belonging to the carrier Cathay Pacific.

0822 UTC: Landed Boston (BOS)


Having declared an emergency shortly after takeoff earlier today, Cathay Pacific flight CX811 has now landed at the departure airport Boston Logan International Airport.

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