Colonel Zbigniew Rzepa, the military prosecutor, who will take part in the study of the causes of the disaster:
- In a standard Tupolev there are five record boxes. Some boxes, which usually do not survive, are "for operational use", while the two are so constructed to survive the most difficult moments in time of disaster. The third one - which was unexpectedly preserved - the mechanics used to ensure that the aircraft was well maintained for flight, or immediately after the flight, to move the data to the hard drive of a computer - then the information will appear immediately, if the aircraft is serviceable or not. There is green, or red light and then you need to check what is wrong, what is the deviation from the norm, which parameter is exceeded, and what you need to do to fix it.