Hi Juha, you are most welcome. I must add that what I described was true for the final years of the war. Aircrafts and aircraft engines were all inventoried in separate lists. Certainly there was some level of overlap between the different kind of reports, but generally speaking they were focusing on specific aspects of the operation. Operating an Air Force, or an Air Army was an extremely complex, dynamic process since they were always on the move, etc., and the situation could change in any minute. This certainly required tons of paperwork. For those who are interested in the Soviet mechanical (loss) reports, here is a sample of the forms mentioned previously. Enjoy!
Gabor
https://kepkuldes.com/image/JW3LkR