Russian space agency Rosaviokosmos says analysis of the Soyuz TMA-1 flight recorders indicates that a malfunction in the spacecraft's computerised control system, not human error, caused the spacecraft to switch from a normal re-entry to a steeper ballistic path during the off-course landing on 4 May.

The three-man crew, returning from the International Space Station, were subjected to higher-than-expected g forces. In addition, a communications antenna malfunctioned before landing. The failure of a NASA back-up system after the craft landed - 460km (290 miles) off course - resulted in contact with the crew being lost for about 1h.

Source: Flight International