LONDON- A United Airlines (UA) Boeing 767-300ER operating flight UA12 from Zurich (ZRH) to Chicago O’Hare (ORD) was forced to divert to London Heathrow (LHR) on Sunday, November 23, after crew members reported fumes in the cabin.
The aircraft was cruising approximately 60 nautical miles north of London when the captain decided to divert. The plane landed at Heathrow just 30 minutes after the decision, ensuring timely medical support and access to emergency services.
United Flight Diverted to London
After departing Zurich at 10:20 a.m., the aircraft experienced a delay of around 40 minutes. During the flight, passengers and crew reported an unusual odor in the cabin, which led to some becoming ill.
The source of the fumes has not been officially disclosed, but such events often involve air contamination from engine or hydraulic systems.
Medical teams were on standby upon landing, and several passengers and crew received treatment immediately after disembarkation. Emergency service vehicles were present as the aircraft taxied to its gate.
Several passengers and flight attendants felt unwell during the flight, prompting the crew to take immediate precautionary measures.
Disruption to Service
The remainder of UA12’s journey to Chicago was canceled. Passengers and crew were accommodated in hotels and provided meal vouchers in London overnight.
On Monday, November 24, United operated a replacement flight UA3908 from Heathrow to Chicago, which departed at 11:40 a.m. and arrived at 2:13 p.m., resulting in a total delay of about 26 hours.
The diversion also caused disruptions to connecting services, with travelers needing to reschedule onward flights. United Airlines ensured alternative arrangements were made for all affected passengers.
United 767-300ER Details and Inspection
The aircraft involved, N665UA, is a 27-year-old Boeing 767-300ER powered by Pratt & Whitney PW4060 engines.
Following the diversion, it underwent a comprehensive inspection at Heathrow and was cleared to resume service. The aircraft subsequently operated the replacement flight the following day and returned to its normal schedule shortly afterward.
The aircraft has a history of technical issues, but has been maintained according to safety regulations, according to Simple Flying:
This aircraft has been in hot water a few times before…where the airplane was traveling from London Heathrow to Newark Liberty International Airport on March 26. During that flight, it experienced an engine failure, forcing the aircraft to return to the British capital. “
United has continued routine inspections and checks to ensure operational safety across its fleet.
Bottom Line
United Airlines flight UA12 diverted to London Heathrow after cabin fumes affected passengers and crew.
The aircraft landed safely, underwent inspection, and the affected travelers were re-accommodated. The replacement flight to Chicago operated the following day, resulting in a 26-hour delay.
This incident highlights the importance of cabin air monitoring and ongoing safety protocols within commercial aviation.
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