First of all, I' d like to thank each of you! Frankly speaking after few days since I wrote this post and noone had asnwer me I've lost any hope to solve that mystery. Now I know why this forum is such incredible place- there is no question can hide
Our part 4th really looks like the part found by Tony. At least I'm sure those are parts of BMW 801 (previously I had to check all the elements of plane, thousands of parts and hundreds of pages of the manual). Now I need to recognize the rest. It could be difficult as those could be parts placed inside of engine. Impossible to notice in the photos.
@RT
Haker is from the Ostfront LW losses list I've got from my friend. As it turned out the pilot died in ... the West. So it must be a mistake in the document. Next two pilots you recognized are connected with Deblin. Unfortunately it's to far

To have sure it was a pilot of our plane he should crashed between July and August '44 near places like Zamosc (Zamocz) or Klemensow.
So I have three men less to check
