What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On radio check flight pulled mixture control by mistake instead of carb heat. Rotor RPM decayed due friction locked
As the FAA filed it
ON RADIO CHECK FLIGHT PULLED MIXTURE CONTROL BY MISTAKE INSTEAD OF CARB HEAT. ROTOR RPM DECAYED DUE FRICTION LOCKED
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N90270 · 2
Matched to the same aircraft by N-number and date.
Accident 20230627019109ALanding: Touchdown · Anderson, SCThe helicopter experienced a vibration earlier in the day. The pilot/[privacy data omitted]/mechanic performed a blade tension check by hand after landing. The yellow blade seemed much weaker than the other two blades. The helicopter was put into maintenance…Accident 19870220036679ASfl Autorotation · Jacksonville, FLThe helicopter landed hard and the tail boom was severed. The instructor failed to maintain rotor speed.