Blue Air Depressurization over Bucharest

A Blue Air Boeing 737-400, registration YR-BAR performing flight 0B-105 from Bucharest Otopeni (Romania) to Paris Beauvais (France), was climbing through FL330 out of Bucharest when the crew initiated an emergency descent due to the loss of cabin pressure and returned to Bucharest for a safe landing about 50 minutes after departure. Romania's CIAS reported there were no injuries, the investigation board opened an investigation into the occurrence. The occurrence aircraft recently had another occurrence, which might be related to this one, see: Incident: Blue B734 near Bucharest on Oct 19th 2016, deafening noise in cockpit. The occurrence aircraft resumed service 23 hours after landing back.

Source: http://avherald.com/h?article=4a2eaab9&opt=0