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Air Canada Flight Returns to Heathrow After Midair Emergency

No injuries were reported after the Boeing 777-300ER turned back, and Air Canada has not confirmed the cause of the emergency.

  • On Saturday, Air Canada Flight AC853 declared a mid-air emergency shortly after departing London Heathrow Airport bound for Toronto, issuing a Squawk 7700 code to signal a serious onboard issue to air traffic control.
  • The Boeing aircraft abandoned its transatlantic crossing at 34,000ft, executing a controlled turn back towards London while authorities placed emergency response teams at Heathrow on standby as a precautionary measure.
  • Landing safely on runway 27L at approximately 10:02 BST, the aircraft taxied to the gate with no injuries reported among passengers, who returned to the terminal under escort from emergency vehicles.
  • Although the specific cause remains unconfirmed, such alerts can indicate various scenarios ranging from technical malfunctions to medical emergencies, with authorities now conducting a thorough review of the incident.
  • Flight tracking data provided by AirLive indicates the aircraft commenced its return shortly after reaching cruising altitude on Saturday, with Air Canada arranging to reschedule the affected service for later that morning.
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Aviation news and services broke the news on Saturday, May 2, 2026.
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