Pilot error caused the civil aviation ministry helicopter crash killing 10 people , probe finds . The crew did not consult the weather forecast , nor did it plan a route before taking off , said Nagendra Prasad Ghimire , the joint secretary of the civil aviation ministry and part of the investigation commission . Crew did not consult weather forecast nor plan a route before taking off . Air crew comprised of 10 Belarussian and two Russians .
Pilot error caused the civil aviation ministry helicopter crash killing 10 people , probe finds . Crew did not consult weather forecast nor plan a route before taking off . Air crew comprised of 10 Belarussian and two Russians .