Hi Brian,
Just surfing the net and came across this incident.
Consolidated B-24D-15-CF Liberator 42-63970 (93rd BG, 330th BS) developed engine trouble right after takeoff Jan 31, 1944 and tried to return. Fearful of jettisoning bombs, crew headed the plane out to sea and bailed out. Plane smoothed out and continued to circle around for some time. RAF had to shoot the plane down.
It comes from here:
http://home.att.net/~jbaugher/1942_3a.html
Alex