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NTSB Report
June 25, 2007 · Robinson R22 · N980SM
Tucson, AZ
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
June 25, 2007
Injury Outcomes
No injuries (2 uninjured)
Location
Tucson, AZ
Aircraft
Robinson R22
Tail Number
N980SM
Operator
Voyager Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA07CA180
The certified flight instructor (CFI) and private pilot undergoing instruction were conducting 180-degree autorotations in a helicopter. The accident happened on the third autorotation. The CFI stated that the entry and glide into the autorotation were uneventful. During the flare portion, sufficient rotor revolutions per minute (rpm) were not produced, and the low rotor rpm light and horn activated. The helicopter was leveled and a run on landing was performed. According to the CFI, the helicopter was not over the intended hard surface for landing. During the attempted run on landing, the helicopter ran over a 3-foot drop off and came to rest on its left side. The CFI did not report any mechanical malfunctions. The temperature at the time of the accident was reported as 39 degrees Celsius.
NTSB Probable Cause
The certified flight instructor's inadequate supervision of the practice autorotation. Contributing factors included the terrain drop off and the failure of the pilot undergoing instruction to maintain adequate rotor rpm.
Full Narrative
The certified flight instructor (CFI) and private pilot undergoing instruction were conducting 180-degree autorotations in a helicopter. The accident happened on the third autorotation. The CFI stated that the entry and glide into the autorotation were uneventful. During the flare portion, sufficient rotor revolutions per minute (rpm) were not produced, and the low rotor rpm light and horn activated. The helicopter was leveled and a run on landing was performed. According to the CFI, the helicopter was not over the intended hard surface for landing. During the attempted run on landing, the helicopter ran over a 3-foot drop off and came to rest on its left side. The CFI did not report any mechanical malfunctions. The temperature at the time of the accident was reported as 39 degrees Celsius.
Flight
Event TypeAccident
Event Time13:25 MST
Nearest AirportTucson Int'L (0nm)
Flight Plan FiledNone
Aircraft FireNo
Aircraft
AircraftRobinson R22
Tail NumberN980SM
Aircraft CategoryHeli
DamageSubstantial
OperatorVoyager Helicopters
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsTextron Lycoming · O-320-B2C · Reciprocating
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 43 · Second Class
Crew 2Age 40 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind280° @ 10 kt, gusting 14 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point10 C / 21 C
Altimeter29.95 inHg
Observation Time19:53