Thanks for the quick replies, I didn't check if Pfeiffer was killed or not, but the Volksbund database as effectively an Albert Pfeifer (only one f) killed on 11 August 1943 and buried in Ysselsteyn (where almost all German war dead in Netherlands were reburied after the war).
By the way, in Rosipal file there are three losses for Pfeiffer-named pilots iMHO:
1) on 25 July 1943, Uffz Pfeiffe (sic) of 7./JG 54 bailed out wounded from his Bf 109 G-6 WNr 19818 in Castricum-Velsen (Nordseekanal) area after an air battle (presumably against 8th Air Force bombers)
2) the loss studied above reported in file on 10 August 1943 and occuring on the 11th according to a majority of source, NVM included. Also the pilot was named Uffz Norbert Pfeiffer and was unhurt according to the file, while in fact it was Uffz Albert Pfeifer and he was killed.
3) Uffz Norbert Pfeiffer of 10./JG 54 went missing on 3 November 1943 when his Bf 109 G-6 WNr 17013 was lost in an air battle in Oranienbaum area, west of Leningrad.
I guess that Rosipal confused Norbert Pfeiffer and Albert Pfeifer for the loss 2. For the loss 1, it is possible that Albert Pfeifer was the pilot involved (same Staffel and rank, close name) but then his wounds should have been very light to fly another sortie 16 days later. On the other hand, Albert Pfeifer was killed in a non-operational sortie, so may have returned to his unit after a short stay in hospital without having been declared operational again.
As for Eckert crashplace, I think it is strange that no location would be listed in the QM returns if the crash occured on an airfield. It is also possible that he went missing during a flight from Iwanowka airfield, that was the last known location for him, and so was reported on the document used by the Volksbund (NVM?), but actually crashed away from it.
By the way, I am interested in the precise location and Russian name (
) of Iwanowka airfield used by JG 54 in summer 1943.
Sorry that each answer brings more questions...
Thanks in advance
Laurent