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NTSB Report
July 16, 2012 · Robinson Helicopter R22 · N47WH
Bountiful, UT
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 16, 2012
Injury Outcomes
No injuries (2 uninjured)
Location
Bountiful, UT
Aircraft
Robinson Helicopter R22
Tail Number
N47WH
Operator
Upper Limit Aviation
Injuries
None
Aircraft Damage
Substantial
NTSB Number
WPR12CA307
While performing a simulated power-off autorotation with a power recovery, the certified flight instructor (CFI) and student noted that the main rotor rpm was decaying. About 150 to 200 feet above ground level (agl), the instructor took the flight controls, executed a flare about 50 feet agl, and realized that the helicopter was going to settle. The instructor then attempted a run-on landing, but the helicopter landed hard, spreading the skid landing gear and damaging the rotors, frame, engine and transmission. The helicopter then slid about 75 feet down the runway, departed the runway surface, and rolled four times before coming to rest on its left side. The CFI stated that there were no mechanical problems with the helicopter prior to the accident.
NTSB Probable Cause
The student’s failure to maintain adequate rotor rpm and the flight instructor’s delayed remedial action, which resulted in a hard landing.
Full Narrative
While performing simulated power-off autorotations with a power recovery, the certified flight instructor (CFI) and student noted that the main rotor rpm was decaying. About 150 to 200 feet above ground level (agl), the CFI took the flight controls and executed a flare about 50 feet agl, and realized the helicopter was going to settle. The CFI then attempted a run on landing, but the helicopter landed hard, spreading the skid landing gear. The helicopter then slid about 75 feet down the runway, departed the runway surface, and rolled four times before coming to rest on its left side. The CFI stated that there were no mechanical problems with the helicopter.
Flight
Event TypeAccident
Event Time12:05 MDT
Nearest AirportBountiful Skypark (0nm)
Runway16
Runway Length4700 ft
Runway Width70 ft
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRobinson Helicopter R22
Tail NumberN47WH
Aircraft CategoryHeli
DamageSubstantial
OperatorUpper Limit Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-J2A · Reciprocating · 180
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 39 · Second Class · None
Crew 2Age 75 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 10 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point28 C / 9 C
Altimeter29.98 inHg
Observation Time17:28
Weather SourceWFAC