Excerpt from news article suggests that the aircraft and its systems were functioning correctly up to impact. This based on early analysis of CVR
Black Box Shows Superjet Had No Malfunctions | Russia | RIA Novosti
A preliminary examination of the flight recorder from the Sukhoi Superjet 100 that crashed in Indonesia at the beginning of May showed all the systems were functioning properly up until impact, a source in the investigation team told RIA Novosti on Monday.
The terrain awareness and warning system was also switched on, the source in the mixed Indonesian-Russian team said.