Local TV just said flight voice recorder tape is empty, the other tapes show "normal behaviour". An insider info from avia.ru forums says the rules were fixed for a very steep climb (sorry for not using the pro slang). The Il-86 was in SVO for only about 1.5 hrs en route from Sochi to Pulkovo, Petersburg and left empty save for the crew and air technics, so some speculate its captain plain forgot there are no pax aboard and the plane is much lighter. There was not much fuel aboard so the fire was quickly extinguished, the SVO firemen did their best. The surviving stewardesses were seated in the tail and can not tell much of the crash except for "strong vibration then drop".
Thank you for all the good wishes and compassion.