Aeroflot A332 at Moscow on Aug 16th 2014, cabin did not pressurize

An Aeroflot Airbus A330-200, registration VP-BLX performing flight SU-1124 from Moscow Sheremetyevo to Sochi (Russia), was climbing out of Moscow when the crew stopped the climb at FL100 due to problems with the cabin pressure and returned to Sheremetyevo for a safe landing about 25 minutes after departure.

A replacement Airbus A330-300 registration VQ-BEK reached Sochi with a delay of 4 hours.