The investigation into the crash of a South Korean Army UH-1H crash in Chuncheon on Feb. 15 found that the rotor-craft’s hydraulic servo valve had failed while the aircraft was in a hover.
![PYH2016021503430006200_P2[1]](http://alert5.com/wp-content/uploads/2016/02/PYH2016021503430006200_P21.jpg)
Three of the four on board were killed in the accident.
The Army said it had inspected all the servo valves on its UH-1 fleet after the mishap and reinforced training on how to handle such failures for its pilots.