Fatally crashed into a Farm House on Flush Road, Belfast on the 11th September 1943. He is buried at Ballycranbeg (Mount St. Joseph) Roman Catholic Graveyard.
On the 11th of September 1943, Flight Sergeant Kołek was on a training sortie in a formation of three led by Warrant Officer Stanisław Grondowski over Co Antrim in very bad weather conditions. Things started to turn badly when the formation got lost in the hills surrounding Belfast. His Spitfire BL469 PK-F crashed into a farmhouse on Flush Road near Mallusk killing Flight Sergeant Kołek instantly.
On the 29th of May 2020, a crash site memorial dedicated in memory of Flight Sergeant Kołek was unveiled at Boghill Road, Mallusk