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NTSB Report
December 2, 1992 · Hughes 369B · N5035F
Fallbrook, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 2, 1992
Injury Outcomes
2 injuries (2 fatalities)
Location
Fallbrook, CA
Aircraft
Hughes 369B
Tail Number
N5035F
Operator
Haverfield
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
LAX93LA057
THE PILOT AND NONFLYING CREWMEMBER WERE PLACING MARKER BALLS ON HIGH TENSION WIRES. THE PILOT MISJUDGED THE DISTANCE FROM THE WIRES AND A MAIN ROTOR BLADE STRUCK THE UPPER GUIDE WIRE OF THE HIGH TENSION WIRES. THE MAIN ROTOR BLADE SEVERED THE TAIL BOOM ASSEMBLY. THE HELICOPTER ROTATED AFTER THE IMPACT AND THE TAIL BOOM ASSEMBLY STRUCK THE HIGH TENSION WIRES STANCHION. THE HELICOPTER PLUMMETED, UNCONTROLLED, TO THE GROUND. THE WRECKAGE AND VIDEO TAPE EXAMINATION DISCLOSED NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS OR FAILURES.
NTSB Probable Cause
THAT THE PILOT MISJUDGED THE DISTANCE OF THE HIGH TENSION WIRES FROM THE HELICOPTER.
Full Narrative
THE PILOT AND NONFLYING CREWMEMBER WERE PLACING MARKER BALLS ON HIGH TENSION WIRES. THE PILOT MISJUDGED THE DISTANCE FROM THE WIRES AND A MAIN ROTOR BLADE STRUCK THE UPPER GUIDE WIRE OF THE HIGH TENSION WIRES. THE MAIN ROTOR BLADE SEVERED THE TAIL BOOM ASSEMBLY. THE HELICOPTER ROTATED AFTER THE IMPACT AND THE TAIL BOOM ASSEMBLY STRUCK THE HIGH TENSION WIRES STANCHION. THE HELICOPTER PLUMMETED, UNCONTROLLED, TO THE GROUND. THE WRECKAGE AND VIDEO TAPE EXAMINATION DISCLOSED NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS OR FAILURES.
Flight
Event TypeAccident
Event Time10:12 PST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftHughes 369B
Tail NumberN5035F
Aircraft CategoryHeli
DamageDestroyed
OperatorHaverfield
Operating RulePart 133
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft
Seats4
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 29 · First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility6 sm
CeilingOvercast 3000 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT