CA965 - Incident: Air China B773 near Tomsk on Aug 28th 2025

An Air China Boeing 777-300, registration B-2087 performing flight CA-965 from Beijing (China) to Frankfurt/Main (Germany), was enroute at FL300 near Tomsk (Russia) when the crew descended the aircraft to FL230 and decided to return to Beijing after the passenger oxygen masks were released due to mechanical malfunction. The aircraft landed safely back on Beijing's runway 19 about 8.5 hours after departure.

A replacement Boeing 777-300 registration B-2045 reached Frankfurt with a delay of about 10 hours.

The occurrence aircraft is still on the ground in Beijing about 15 hours after landing back.