Air Canada Flight Returns Safely to Heathrow After Emergency

An Air Canada flight bound for Toronto declared a midair emergency shortly after departing London's Heathrow Airport on Saturday, May 2, prompting a safe return to the airport under precautionary escort.

Flight AC853, a Boeing 777-300ER, took off at 8:34 a.m. BST and climbed to 34,000 feet before the crew issued Squawk 7700, a transponder code signaling a serious onboard issue, less than an hour into the journey. The aircraft, which had reached cruising altitude around 9:15 a.m., executed a controlled turn back toward Heathrow. Emergency response teams were placed on standby as the plane descended and landed safely on runway 27L at approximately 10:02 a.m. Arrivals on Heathrow's south runway were briefly suspended during the incident.

Passengers and crew were escorted back to the terminal by emergency vehicles after the aircraft taxied to a gate. No injuries were reported among the roughly 300 people aboard.

Air Canada has not disclosed the specific cause of the emergency, which could stem from technical faults, medical incidents, or other issues. The airline arranged an alternative departure later that morning for those affected, allowing the flight to resume its transatlantic route.