Weather and darkness were the major factors in a fatal helicopter crash in Northern Ontario that killed the pilot and sole passenger.  The Transportation Safety Board of Canada says the chopper was on its way to a timber camp near Foleyet when it hit trees on a hilly terrain and went down in September, 2015.  The board says the helicopter left for the camp as darkness approached and the weather started deteriorating.  The board`s report also points out that the helicopter was not equipped for night-time flying and the pilot was not licensed to fly at night.  The bodies of both men were found about 20 hours after the chopper crashed.