Announced in January, the rules increased flight crews' weekly rest periods to 48 hours from 36 and cut pilots' night flight duty times to a maximum of 10 hours from 13
The L-410 aircraft flying from the city of Irkutsk came down 4 kilometres (2.5 miles) from its destination, Kazachinkoye village, the Investigative Committee law enforcement agency said.
According to preliminary reports by local emergency services, there was an equipment failure, which the crew reported before making the hard landing, Interfax news agency reported.
Initial media reports said 11 people had been trapped inside the aircraft after it came down. Footage circulated on social media, purportedly of the landing scene, showed rescue workers with stretchers shining torches near a river at night.