A British Airways Airbus A321-200, registration G-MEDF performing flight BA-232 from Moscow Domodedovo (Russia) to London Heathrow, EN (UK), was en route at FL340 about 140nm northeast of Warsaw (Poland) when the crew initiated an emergency descent to FL100 being level at FL100 6 minutes after leaving FL340, the passenger oxygen masks did not need to deploy. The aircraft diverted to Berlin’s Tegel Airport for a safe landing about 65 minutes after leaving FL340.
The aircraft remained on the ground for about 2:15 hours, then continued the flight climbing to a maximum cruise level 280 and reached London with a delay of 2:20 hours.
The aircraft remained on the ground in London for 2:15 hours, then departed for the next scheduled flight climbing to FL350.