The most recent incident follows an earlier one which caused the hard landing of a 777 in London.

According to Boeing, the fuel temperature in over 200 of its 777s that are equipped with Rolls-Royce Trent 800-series engines should not remain at -10°C or below after two hours in flight. This is one hour less than the company advised customers in a notice issued on 29 January.

After two hours at these extreme temperatures, pilots are instructed to reduce the plane’s altitude, which results in both slower air speeds and higher rates of fuel consumption.

“It’s not the greenest thing in the world, but it’s the safest thing we can do right now,” said Boeing spokeswoman Liz Verdier in comments to The Associated Press earlier this week.

via The Post