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NTSB Report
August 14, 2010 · Robinson Helicopter R22 BETA · N404LE
Mack, CO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
August 14, 2010
Injury Outcomes
No injuries (2 uninjured)
Location
Mack, CO
Aircraft
Robinson Helicopter R22 BETA
Tail Number
N404LE
Operator
North Canyon Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CEN10CA485
The certificated flight instructor (CFI) and his student were practicing a 180-degree autorotation with a power recovery occurring at the hover. The helicopter's sink rate increased dramatically in the flare, about 40 feet above the ground. The CFI initiated a go-around by increasing power, raising the collective, and pushing the cyclic forward. The helicopter continued to descend and contacted the runway in a level attitude. After it came to a stop, the CFI confirmed that the main rotor blade had struck the tail boom. The instructor reported that there were no preimpact mechanical deficiencies with the helicopter.
NTSB Probable Cause
The flight instructor's failure to maintain control of the helicopter during a practice autorotation, which resulted in a hard landing.
Full Narrative
The certified flight instructor and his student were practicing a 180 degree autorotation with a power recovery to a hover, when the helicopter's sink rate increased dramatically in the flare about 40 feet above the ground. The flight instructor called for a go-around and increased power, raised the collective, and pushed the cyclic forward. The helicopter continued to descend and contacted the runway in a level attitude. After it came to a stop, a vibration was felt and the instructor confirmed that the main rotor blade had struck the tail boom. The instructor reported that there were no mechanical deficiencies with the helicopter.
Flight
Event TypeAccident
Event Time08:50 MDT
Nearest AirportMack-Mesa Airport (0nm)
Runway07
Flight Plan FiledUnknown
Aircraft FireNo
Aircraft
AircraftRobinson Helicopter R22 BETA
Tail NumberN404LE
Aircraft CategoryHeli
DamageSubstantial
OperatorNorth Canyon Helicopters
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-J2A · Reciprocating · 145
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 36 · Second Class
Crew 2Age 34 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0