What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) After sitting overnight in a remote location, it appears that moisture collected in the air intakes of the engines. The pilot and the local fire chief cleaned wet snow off of the aircraft prior to engine start and insured to the best of their ability that the inlets were clear. The pilot ran the engines for an extended period on the ground and in a hover prior to departure. After takeoff, the left engine failed. While returning to land and just starting to decelerate prior to the flair, the right engine failed. An auto-rotation was attempted. The aircraft hit with little forward speed and almost no rotor RPM.
As the FAA filed it
(-23) AFTER SITTING OVERNIGHT IN A REMOTE LOCATION, IT APPEARS THAT MOISTURE COLLECTED IN THE AIR INTAKES OF THE ENGINES. THE PILOT AND THE LOCAL FIRE CHIEF CLEANED WET SNOW OFF OF THE AIRCRAFT PRIOR TO ENGINE START AND INSURED TO THE BEST OF THEIR ABILITY THAT THE INLETS WERE CLEAR. THE PILOT RAN THE ENGINES FOR AN EXTENDED PERIOD ON THE GROUND AND IN A HOVER PRIOR TO DEPARTURE. AFTER TAKEOFF, THE LEFT ENGINE FAILED. WHILE RETURNING TO LAND AND JUST STARTING TO DECELERATE PRIOR TO THE FLAIR, THE RIGHT ENGINE FAILED. AN AUTO-ROTATION WAS ATTEMPTED. THE AIRCRAFT HIT WITH LITTLE FORWARD SPEED AND ALMOST NO ROTOR RPM.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.