Created Thursday, Dec 8th 2022 20:49Z, last updated Thursday, Dec 8th 2022 20:49Z
A Lufthansa Boeing 747-8, registration D-ABYD performing flight
LH-431 from Chicago O'Hare,IL (USA) to Frankfurt/Main (Germany), was climbing out of Chicago cleared to climb to 15000 feet when the crew stopped the climb at 12000 feet and descended back to 10,000 feet due to problems with the cabin pressurization. After about 20 minutes the aircraft continued the climb but stopped again at FL250 continuing in the general direction of their planned route to Frankfurt. About 50 minutes after stopping the climb at FL250 the crew decided to turn around and return to Chicago. The aircraft descended to FL200 and dumped fuel and subsequently landed on Chicago's runway 28C about 3:45 hours after departure.
A passenger reported other passengers reported having trouble with their ears. Oxygen masks were not released. The flight was cancelled and the passengers were rebooked onto other flights the following day.
The aircraft remained on the ground for about 21 hours, then positioned back to Frankfurt and is still on the ground in Frankfurt about 60 hours after landing back in Frankfurt.
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