Halifax JP276, from148 Squadron, took off from Brindisi, Italy at 19:56 hours on 4th August 1944 to carry out a special operation over Southern Poland. From the time of take-off nothing further was heard. On board were: Flight Lieutenant Arnold Raymond Blynn, RCAF Pilot http://www.cwgc.org/search/casualty_details.aspx?casualty=2193542 Flying Officer Harold Leonard Brown, RCAF Wireless Operator http://www.cwgc.org/search/casualty_details.aspx?casualty=2193559 Pilot Officer George Alfred Chapman, RCAF Navigator http://www.cwgc.org/search/casualty_details.aspx?casualty=2193574 Flight Sergeant Arthur George William Liddell, RCAF Air Gunner http://www.cwgc.org/search/casualty_details.aspx?casualty=2193745 Flight Sergeant Charles Burton Wylie, RCAF Bomb Aimer http://www.cwgc.org/search/casualty_details.aspx?casualty=2193954 Sergeant Kenneth James Ashmore, RAF (VR) Air Gunner http://www.cwgc.org/search/casualty_details.aspx?casualty=2193516 Sergeant Frederick George Wenham, RAF (VR) Flight Engineer http://www.cwgc.org/search/casualty_details.aspx?casualty=2193928 It was later reported from eye witnesses on the ground that this aircraft was in difficulty near the town on Dabrowa Tarnowska, and was on fire and flying in the direction of the village of Morzychna. The aircraft was seen to suddenly stop in mid-air before crashing, killing all seven crew members.
Yep, but as the summary from rafweb stated, this was their main duty ("normal" bombing being a side-line!!)