4YOU A320 near Antalya on Aug 6th 2014, loss of cabin pressure

A 4YOU Airlines Airbus A320-200 on behalf of Eurolot, registration UR-CME performing flight K2-6242 from Antalya (Turkey) to Poznan (Poland) with 177 passengers, was climbing through FL340 about 120nm north of Antalya and 140nm south of Istanbul (Turkey) when the crew initiated an emergency descent to 10,000 feet due to the loss of cabin pressure, the passenger oxygen masks were released, however, erroneously selected code for unlawful interference instead of the code for emergency into the transponder causing Istanbul's area control to raise hijack alert. Subsequent carefully crafted communication between Istanbul area control and the crew clarified the situation, the crew changed to the emergency transponder code then the initial squawk, the aircraft continued at 10,000 feet and diverted to Bourgas (Bulgaria), where the aircraft landed safely.

A replacement Travel Service Boeing 737-800 registration OK-TVW was dispatched to Bourgas, resumed the flight as K2-6401 and reached Poznan with a total delay of 14 hours including a delay of 3.5 hours that resulted from maintenance in Antalya.