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NTSB Report
June 13, 1992 · Hughes OH-6A · N10436
Sunland Park, NM
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 13, 1992
Injury Outcomes
1 injury (1 fatality)
Location
Sunland Park, NM
Aircraft
Hughes OH-6A
Tail Number
N10436
Operator
U S Border Patrol
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
FTW92GA157
THE AIRCRAFT WAS BEING FLOWN ON A U. S. BORDER PATROL SURVEILLANCE MISSION WHEN IT STRUCK TWO STATIC LINES OF A POWER TRANSMISSION SYSTEM. THE 125 FOOT HIGH LINES WERE STRUNG ACROSS A DRAW AND SUPPORTED BY TOWERS LOCATED ON MOUNTAINS ON EITHER SIDE OF THE DRAW. THE AIRCRAFT WAS EQUIPPED WITH A WIRE STRIKE PROTECTION SYSTEM AND EVIDENCE INDICATED THAT ONE OF THE STATIC LINES WAS ENGAGED AND CUT BY THE UPPER CUTTER. HOWEVER, THE EVIDENCE ALSO INDICATED THAT THE SECOND STATIC LINE STRUCK THREE OF THE FOUR BLADES OF THE MAIN ROTOR SYSTEM. THE BLADES SUBSEQUENTLY DEPARTED THE HUB AND THE MAIN TRANSMISSION SEPARATED FROM THE AIRFRAME.
NTSB Probable Cause
THE PILOT'S FAILURE TO SEE AND AVOID THE WIRES.
Full Narrative
THE AIRCRAFT WAS BEING FLOWN ON A U. S. BORDER PATROL SURVEILLANCE MISSION WHEN IT STRUCK TWO STATIC LINES OF A POWER TRANSMISSION SYSTEM. THE 125 FOOT HIGH LINES WERE STRUNG ACROSS A DRAW AND SUPPORTED BY TOWERS LOCATED ON MOUNTAINS ON EITHER SIDE OF THE DRAW. THE AIRCRAFT WAS EQUIPPED WITH A WIRE STRIKE PROTECTION SYSTEM AND EVIDENCE INDICATED THAT ONE OF THE STATIC LINES WAS ENGAGED AND CUT BY THE UPPER CUTTER. HOWEVER, THE EVIDENCE ALSO INDICATED THAT THE SECOND STATIC LINE STRUCK THREE OF THE FOUR BLADES OF THE MAIN ROTOR SYSTEM. THE BLADES SUBSEQUENTLY DEPARTED THE HUB AND THE MAIN TRANSMISSION SEPARATED FROM THE AIRFRAME.
Flight
Event TypeAccident
Event Time13:06 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes OH-6A
Tail NumberN10436
Aircraft CategoryHeli
DamageDestroyed
OperatorU S Border Patrol
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C18 · Turboshaft · 278
Seats4
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 49 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 9 kt
Visibility70 sm
CeilingNone
Temperature / Dew Point27 C
Altimeter29.00 inHg
Observation Time18:51
Weather SourceWFAC