LONDON, UK — Hundreds of passengers bound for the U.S. West Coast found themselves back where they started on Monday afternoon after a United Airlines Boeing 777-300ER was forced to abandon its transatlantic crossing due to a technical issue.
United Flight UA949, scheduled to fly from London Heathrow (LHR) to San Francisco (SFO), safely returned to the English capital after nearly three hours in the air.
Flight Timeline: A Journey to Nowhere
The aircraft, a twin-aisle Boeing 777-300ER registered as N2136U, followed a routine departure sequence before the mission was compromised:
- 1:26 PM BST: The flight departed London Heathrow’s Runway 09R on schedule from Gate B47.
- The Ascent: The jet climbed to an initial cruising altitude of 34,000 feet, tracking northwest over the United Kingdom.
- The Issue: Just as the aircraft reached the coast of Scotland and prepared to begin its crossing of the Atlantic Ocean, the crew reported an unspecified “maintenance issue.”
- Fuel Burn: To ensure a safe landing weight, the pilots descended to 26,000 feet and entered a holding pattern for approximately one hour. This maneuver is standard for long-haul aircraft which take off with heavy fuel loads that exceed their maximum structural landing weight.
Return to Heathrow
After shedding enough weight to satisfy safety protocols, the aircraft tracked back across England. It touched down on Heathrow’s Runway 09L at 4:13 PM BST, exactly 2 hours and 47 minutes after its initial departure.
Emergency services were on standby as a precaution, though the landing was described as routine.
Passenger Impact
In a statement following the landing, United Airlines confirmed the cancellation of the flight to allow engineers to inspect the aircraft:
“United flight 949 returned to London Heathrow to address a technical issue. The aircraft landed safely and the flight has been canceled for a maintenance review. We are working to rebook our customers on alternative flights as soon as possible.”
The Boeing 777 involved was removed from service immediately for repairs. Affected passengers were provided with assistance at Terminal 2, with many being rerouted through United’s other hubs or placed on Tuesday’s scheduled departures to San Francisco.
