Marcus, just a sample of recovered IL-2 Sturmovik parts with the plane's c/n: 1875397. See beside the very same c/n listed in the Soviet (summary) loss-report of the 17 VA in March, 1945. The Soviet AC documentation is absolutely correct, in fact it is regularly used by the researchers to identify the recovered remains (bones) of missing aircrews, based on the MATCHING airframe and AC engine-numbers found in the Soviet loss reports as well as on the recovered remains:
https://www.flickr.com/photos/194997...posted-public/
In short: yes, the mentioned documentation can be used for testing/verifying the Axis victory claims. Some will stand the test, others will fail. Luckily those days are over when everything was accepted based on one sided and unchecked claims, resulting false legends and false history.
Gabor