Rechlin - Aircraft Crash 1943: 2 Questions

[hucks216]

I have a wehrpass to a former pilot of 7./KG 26 who was assigned to the Technisches Btl at Rechlin in mid 1941. He was killed in an aircraft crash on 10th August1943.
I have looked through the book German Secret Flight Test Centres To 1945 and can find no mention of anything that tallies in the lists at the end of the Rechlin chapter. Does anyone have any information with regards to an aircraft crash at Rechlin on that date?
Of course the crash may of happened elsewhere, maybe on a liaison flight in which case it wouldn't be listed I expect but thought that I'd ask anyway.

The second question is, what would a pilot in the Technisches Btl do? Would he be involved as a test pilot with German aircraft or captured Allied aircraft?

His rank & name is Oberfeldwebel Alfred Noetzel and he is listed in the Volksbund as dying at Mar.Laz Bodburg-Hau (while the Mar.Laz refers to a hospital I assume, the closest place I can find to a Bodburg-Hau is BEdburg-Hau in the far west of Germany) and the Volksbund mentions that his body remains buried in Russia, so why would a member of the Technisches Btl at Rechlin be in Russia? (Which I suppose makes it 3 questions!)