Simon Glancey has submitted the following:
Sgt. McEwen was the bomb aimer on board Avro Lancaster I ED334 OL-R of 83 Squadron, which was lost on a mission to Essen. The Lancaster was shot down by a Luftwaffe night-fighter flown by Hptm. Herbert Lütje of III./NJG1, and crashed at Winterswijk with the loss of all seven crew members.
Royal Air Force Bomber Command Losses of the Second World War: 1943; W.R. Chorley; 1996; Midland Counties Publications; ISBN 0 904597 90 3, page 90