What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
While finishing a spray application in steep logging terrain the pilot heard 2 loud compressor stalls with a slight yaw to left. Engine power was decreased and the helicopter was maneuvered downslope to allow for engine recovery. The compressor stalls continued and the engine performance began to decay. The pilot selected a landing site and nosed the helicopter uphill while applying collective pitch to cushion the landing. Upon impact, the main rotor blades contacted the ground and helicopter rolled clockwise downhill resting nose down on left side with the engine running.
As the FAA filed it
WHILE FINISHING A SPRAY APPLICATION IN STEEP LOGGING TERRAIN THE PILOT HEARD 2 LOUD COMPRESSOR STALLS WITH A SLIGHT YAW TO LEFT. ENGINE POWER WAS DECREASED AND THE HELICOPTER WAS MANEUVERED DOWNSLOPE TO ALLOW FOR ENGINE RECOVERY. THE COMPRESSOR STALLS CONTINUED AND THE ENGINE PERFORMANCE BEGAN TO DECAY. THE PILOT SELECTED A LANDING SITE AND NOSED THE HELICOPTER UPHILL WHILE APPLYING COLLECTIVE PITCH TO CUSHION THE LANDING. UPON IMPACT, THE MAIN ROTOR BLADES CONTACTED THE GROUND AND HELICOPTER ROLLED CLOCKWISE DOWNHILL RESTING NOSE DOWN ON LEFT SIDE WITH THE ENGINE RUNNING.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.