What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) During the conduct of a 14 CFR part 61 training flight the crew decided to perform a pinnacle/ridge approach and landing. They conducted a high area reconnaissance and a 500 ft AGL oge (out of ground effect power check) and it appeared there was sufficient power available to continue the manuever. During the descent the CFI began to feel the approach angle was getting too steep and at about that time he was making a decision to execute a go-around. However, as he decided to take that action he noticed the engine and rotor RPM were decaying and below operating limits. He decided to basically crash land as best he could. Eventually, the skids contacted the terrain and the aircraft rolled on the left side. The CFI stated he had previously landed at this site several times in this make and model without incident. The CFI thinks he just acted too late to notice the engine and rotor RPM were drooping and that by then there was insufficient altitude to reduce the collectiv and add throttle to regain normal operating RPM.
As the FAA filed it
(-23) DURING THE CONDUCT OF A 14 CFR PART 61 TRAINING FLIGHT THE CREW DECIDED TO PERFORM A PINNACLE/RIDGE APPROACH AND LANDING. THEY CONDUCTED A HIGH AREA RECONNAISSANCE AND A 500 FT AGL OGE (OUT OF GROUND EFFECT POWER CHECK) AND IT APPEARED THERE WAS SUFFICIENT POWER AVAILABLE TO CONTINUE THE MANUEVER. DURING THE DESCENT THE CFI BEGAN TO FEEL THE APPROACH ANGLE WAS GETTING TOO STEEP AND AT ABOUT THAT TIME HE WAS MAKING A DECISION TO EXECUTE A GO-AROUND. HOWEVER, AS HE DECIDED TO TAKE THAT ACTION HE NOTICED THE ENGINE AND ROTOR RPM WERE DECAYING AND BELOW OPERATING LIMITS. HE DECIDED TO BASICALLY CRASH LAND AS BEST HE COULD. EVENTUALLY, THE SKIDS CONTACTED THE TERRAIN AND THE AIRCRAFT ROLLED ON THE LEFT SIDE. THE CFI STATED HE HAD PREVIOUSLY LANDED AT THIS SITE SEVERAL TIMES IN THIS MAKE AND MODEL WITHOUT INCIDENT. THE CFI THINKS HE JUST ACTED TOO LATE TO NOTICE THE ENGINE AND ROTOR RPM WERE DROOPING AND THAT BY THEN THERE WAS INSUFFICIENT ALTITUDE TO REDUCE THE COLLECTIV AND ADD THROTTLE TO REGAIN NORMAL OPERATING 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.