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NTSB Report
August 14, 1992 · Hughes 269C · N9297F
Corona, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 14, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Corona, CA
Aircraft
Hughes 269C
Tail Number
N9297F
Operator
Hiser Helicopter
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX92LA354
THE DUAL STUDENT PILOT WAS PERFORMING PRACTICE AUTOROTATIONS AT REDUCED ENGINE RPM WITHOUT THE USE OF CARBURETOR HEAT. ON THE FOURTH AUTOROTATION THE ENGINE SUSTAINED A TOTAL LOSS OF POWER. THE CFI ASSUMED THE CONTROLS AND CONTINUED WITH THE AUTOROTATION. WHEN THE HELICOPTER WAS BETWEEN 7 TO 10 FEET ABOVE THE GROUND THE CFI APPLIED UP COLLECTIVE WITHOUT CORRECTING FOR THE INCREASED TORQUE (ROTOR PITCH INCREASE). THE HELICOPTER MADE AN ABRUPT LEFT TURN AND LANDED HARD CAUSING DAMAGE TO THE SKIDS AND TAIL BOOM ASSEMBLY. THE ENGINE OPERATED NORMALLY WHEN THE HELICOPTER WAS RECOVERED FROM THE ACCIDENT SITE. THE PREVAILING TEMPERATURE WAS 94 DEGREES F AND THE DEW POINT WAS 63 DEGREES F. ACCORDING TO THE FAA ICING PROBABILITY CHART THE CARBURETOR WAS SUSCEPTIBLE TO CARBURETOR ICING AT GLIDE POWER.
NTSB Probable Cause
THE FLIGHT INSTRUCTOR'S IMPROPER SUPERVISION OF THE FLIGHT; THE DUAL STUDENT PILOT'S FAILURE TO USE CARBURETOR HEAT; AND THE FLIGHT INSTRUCTOR'S IMPROPER USE OF THE TAIL ROTOR PEDALS. CONTRIBUTING TO THIS ACCIDENT WAS THE ENGINE FAILURE DUE TO CARBURETOR ICING.
Full Narrative
THE DUAL STUDENT PILOT WAS PERFORMING PRACTICE AUTOROTATIONS AT REDUCED ENGINE RPM WITHOUT THE USE OF CARBURETOR HEAT. ON THE FOURTH AUTOROTATION THE ENGINE SUSTAINED A TOTAL LOSS OF POWER. THE CFI ASSUMED THE CONTROLS AND CONTINUED WITH THE AUTOROTATION. WHEN THE HELICOPTER WAS BETWEEN 7 TO 10 FEET ABOVE THE GROUND THE CFI APPLIED UP COLLECTIVE WITHOUT CORRECTING FOR THE INCREASED TORQUE (ROTOR PITCH INCREASE). THE HELICOPTER MADE AN ABRUPT LEFT TURN AND LANDED HARD CAUSING DAMAGE TO THE SKIDS AND TAIL BOOM ASSEMBLY. THE ENGINE OPERATED NORMALLY WHEN THE HELICOPTER WAS RECOVERED FROM THE ACCIDENT SITE. THE PREVAILING TEMPERATURE WAS 94 DEGREES F AND THE DEW POINT WAS 63 DEGREES F. ACCORDING TO THE FAA ICING PROBABILITY CHART THE CARBURETOR WAS SUSCEPTIBLE TO CARBURETOR ICING AT GLIDE POWER.
Flight
Event TypeAccident
Event Time11:45 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 269C
Tail NumberN9297F
Aircraft CategoryHeli
DamageSubstantial
OperatorHiser Helicopter
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360 · Reciprocating · 180
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 39 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 7 kt
Visibility6 sm
CeilingNone
Temperature / Dew Point63 F
Altimeter30.00 inHg
Observation Time19:00
Weather SourceWFAC