And the website of the
The Canadian Virtual War Memorial list for 15 December 1944 eight airmen of 168 Sqn RCAF that are all commemorated on Ottawa Memorial, so were probably the crew of a transport B-17 lost in the Atlantic.
By the way you man is listed by the above site as a member of 168 Sqn RCAF, not 138 Sqn.
On this site (
http://www.ody.ca/~bwalker/RCAF_forts_detailed.html), I think I have your aircraft: Fortress III serial 9203
Ex USAAF B-15F-45-VE, serial number 42-6101. Ordered on Purchase Order CA 000115. Taken on strength on 6 December 1943. Used by No. 168 Heavy Transport Squadron, Rockcliffe, for mail flights to Europe and Africa. Lost at sea between Morocco and Azores with 5 crew and 3 passengers, only a few mail bags ever found.
Struck off 7 June 1945, having been lost since 15 December 1944.