Nan Fang Du Shi Bao·2025-08-28 05:52Group 1 - On August 28, Air China flight CA965 from Beijing to Frankfurt experienced an oxygen mask system failure, leading to an emergency return to Beijing for safety reasons [1] - The flight had been airborne for approximately 3 hours before the incident, during which passengers were instructed to use oxygen masks due to a reported cabin pressure loss, which was later clarified as a false alarm [1] - Air China confirmed that the cabin pressure and other systems were functioning normally, and the aircraft safely landed at Beijing Capital International Airport at 11:30 AM [1] Group 2 - This incident is not the first mechanical issue for Air China in recent times, as another flight, CA856 from London to Beijing, had to divert to Russia due to mechanical failure on August 26 [2] - Passengers on flight CA856 reported being stranded at the Russian airport for several hours before being reboarded on a different aircraft [2] - Air China provided updates on the situation, confirming that the diverted flight successfully arrived back in Beijing at 4:40 AM on August 27 [2]