Incident Overview
On a night flight from Volgograd to Tbilisi, both the primary and emergency hydraulic systems failed. The aircraft was unable to lower the main landing gear; only the nose gear could be extended. The stabilizers and flaps remained in a neutral position. The aircraft subsequently performed a belly landing.
Sequence of Events
The aircraft touched down on its belly at a speed of 250 km/h, with the nose gear contacting the runway 1,264 meters past the threshold. Unable to stop within the remaining distance, the airplane overran the runway at a speed of 165 km/h. During the overrun, the aircraft struck a localizer antenna and a concrete wall before coming to rest in a ravine, broken into three pieces.
Injuries
All 30 occupants sustained injuries, with three of them classified as serious.
Probable Cause
Failure of both primary and emergency hydraulic systems in flight after water leaked into a tank due to seal problems, which subsequently froze.