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NTSB Report
July 8, 2023 · Robinson Helicopter R22 BETA · N74778
Emmett, ID
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 8, 2023
Injury Outcomes
2 injuries (2 minor injuries)
Location
Emmett, ID
Aircraft
Robinson Helicopter R22 BETA (2005)
Tail Number
N74778
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
WPR23LA265
The flight instructor reported that he was demonstrating a turning autorotation to his student. The instructor entered the glide, turned, and kept the engine and rotor RPM gauges in the green arc, while maintaining an airspeed of about 55 knots. He increased the throttle setting and raised the collective lever as the helicopter descended through 200 ft AGL, however, the rotor RPMs fell below the green arc. The instructor made the decision to continue the autorotation with ground contact and applied aft cyclic to reduce the decent rate. The helicopter landed hard and nosed over onto its right side, resulting in substantial damage to the tailboom and tail rotor assembly. The instructor reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.
NTSB Probable Cause
The instructor’s failure to maintain airspeed during a simulated turning autorotation, which resulted in a hard landing.
Full Narrative
The flight instructor reported that he was demonstrating a turning autorotation to his student. The instructor entered the glide, turned, and kept the engine and rotor RPM gauges in the green arc, while maintaining an airspeed of about 55 knots. He increased the throttle setting and raised the collective lever as the helicopter descended through 200 ft AGL, however, the rotor RPMs fell below the green arc. The instructor made the decision to continue the autorotation with ground contact and applied aft cyclic to reduce the decent rate. The helicopter landed hard and nosed over onto its right side, resulting in substantial damage to the tailboom and tail rotor assembly. The instructor reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation.
Flight
Event TypeAccident
Event Time12:52 PDT
Nearest Airport0nm
Flight Plan FiledCvfr
Flight Plan ActivatedUnknown
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson Helicopter R22 BETA
Tail NumberN74778
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-J2A · Reciprocating · 145
Seats2
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 25 · Second Class · Minor
Crew 2Second Class · Minor
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point52 F
Altimeter29.87 inHg
Observation Time13:56
Weather SourceWFAC