Hi,
Could it have been this one ?
Consolidated PBY-5A Catalina
2458 (VP-73) beached in Iceland 6/20/1942 after being shot
at by friendly convoy.
This info was updated to-
Hit by enemy fire, landed on beach and later salvaged by USN: DBR 4/seriously inj, 1/minor inj, 3/No injuries.
I beleive the a/c might have carried the side code 73-P-8.
See this link-
http://www.vpnavy.com/vp73_1941.html
Alex