[HGabor]

Sorry, I have no crew details for 15/248, only for 11/196 on January 6, 1945:

ст.л-т Еремин Виталий Михайлович (MIA)
ст.л-т Гончарук Василий Федосеевич (MIA)
с-а Мухтарулин (MIA)

I assume there was no casualty on 15/248, or at least personnel records do not mention them. Soviet records -unlike the American MACRs- do not always report everything in one folder, because eg. the mechanical/maintenance reports do not mention the crews, while combat reports do not always report serials, etc. To get a full view of the event, we must get all possible records together which definitely makes it more difficult.
Gabor