Hi,
based on info from pilot after WWII, cca 30 minutes after they leave target Berlin, the machine starts to lose height and the right engine oil probably some hit from flak.
MAybe are more info about in the book, which is mentioned in last reply of this topic and maybe somebody can check
http://forum.12oclockhigh.net/showthread.php?t=18923
More photos of this machine:
http://www.modelari.org/viewtopic.php?f=40&t=622
Faenor