Source: Simon Hradecky | www.avherald.com

A LOT Polish Airlines de Havilland Dash 8-400, registration SP-EQH performing flight LO-3931 from Warsaw to Szczecin (Poland) with 48 passengers and 4 crew, was climbing through FL120 out of Warsaw when the crew stopped the climb and decided to return to Warsaw reporting they had an unsual smell on board originating in the back of the cabin, the crew declared emergency. The aircraft landed safely on runway 15 about 23 minutes after departure.

The aircraft returned to service about 4 hours after landing back.

The airline reported the crew suspected a malfunction of the air conditioning system and decided to return to Warsaw. The passengers were rebooked onto the next flight.