Created Thursday, Feb 8th 2024 16:46Z, last updated Monday, Feb 10th 2025 14:33Z
A One Air Boeing 747-400 freighter, registration G-ONEE performing flight HC-211 from London Heathrow,EN (UK) to Hong Kong (China), was climbing out of Heathrow's runway 09R when the crew stopped the climb at FL250, already over the North Sea reporting they had lost two of their four generators and requested radar vectors advising they had no lateral navigation left. The aircraft initially turned back towards England, then turned again and diverted to Amsterdam (Netherlands) advising they didn't need any fuel dump, and landed safely on Amsterdam's runway 06 about 85 minutes after departure.
The aircraft is still on the ground in Amsterdam about 7.5 hours after landing in Amsterdam.
On May 29th 2024 the AAIB reported the aircraft experienced failures on two electrical busses and lost all pitot heating. The aircraft diverted to Amsterdam due to marginal weather conditions at Heathrow. The occurrence has been rated a serious incident.
On Feb 10th 2025 the AAIB reported in an interim statement: "The aircraft departed in weather of rain, thick cloud, and icing conditions. Electrical failures resulted from water having leaked onto the aircraft’s avionic equipment – the effects of which included all pitot probe heaters becoming inoperative, and the cabin altitude increasing. The crew began descending the aircraft from FL250 and experienced unreliable flight instrument indications. They diverted the aircraft to Amsterdam Schipol Airport, which had clear weather." The investigation is still ongoing.
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