An Air Canada flight declared a mid-air emergency shortly after departing from London Heathrow Airport on Saturday morning. Flight AC853, bound for Toronto, took off at 8:34 BST and climbed to 34,000 feet before the crew transmitted a Squawk 7700 code, indicating a serious issue on board.
The Boeing 777-300ER abandoned its transatlantic route and made a controlled return to Heathrow, with emergency services placed on standby. The nature of the emergency has not yet been confirmed, but such alerts can signal technical faults or medical incidents.
Tracking data shows the aircraft began its return shortly after reaching cruising altitude at around 09:15 BST. It safely touched down on runway 27L at approximately 10:02 BST, with landings briefly suspended on the south runway.
Passengers were brought back to the terminal after the aircraft taxied to the gate under escort from emergency vehicles. No injuries have been reported, and Air Canada has rescheduled the service with a replacement departure planned for later in the morning.
Heathrow emergency crews remained on standby throughout the incident, following standard protocol. The incident is now expected to be reviewed, with further details anticipated from the airline and airport authorities.
