Thank you. I didn't know that. In fact, last year I asked about Robert 'Bazi' Weiss, who had been grounded for about two months ('Weiss fell ill in May 1943 and was withdrawn from combat until July when he was appointed Staffelkapitän of 3./JG 54'. Source:
http://www.luftwaffe.cz/weiss.html), and nobody knew the answer either. I guess someone told me then it could be in his Soldbuch, that's why I mentioned it.