6 September 2013
Lufthansa flight LH-3305 , Airbus A320 registration D-AIQL from Barcelona to Dusseldorf took off from Barcelona and was climbing at 15000 feet when the oxygen masks deployed because the airplane couldn't pressurize.The crew declared an emergency stopped the climb and diverted back to Barcelona for a safe landing
D-AIQL
First Flight:30-10-1991
Age:21.9 years
Barcelona airport
Source
http://flightaware.com/live/flight/DLH3305/history/20130906/1735Z/LEBL/EDDL