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NTSB Report
October 1, 1990 · Mcdonnell Douglas 369E · N381F
Anadarko, OK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 1, 1990
Injury Outcomes
No injuries (4 uninjured)
Location
Anadarko, OK
Aircraft
Mcdonnell Douglas 369E
Tail Number
N381F
Operator
Oklahoma City Police
Injuries
None
Aircraft Damage
Substantial
NTSB Number
FTW91GA001
PRIOR TO DEPARTURE FROM AN UNIMPROVED HELICOPTER LANDING PAD THE PILOT FAILED TO ASSURE REQUIRED CLEARANCE FROM OBSTACLES POSITIONED ALONG HIS ROUTE OF DEPARTURE. THE HELICOPTER STRUCK A SINGLE ELECTRICAL POWER LINE RESULTING IN LOSS OF CONTROL DUE TO THE CONTROL RODS BEING SEVERED. A FORCED LANDING WAS PERFORMED BY REDUCING THE ENGINE POWER, HOWEVER, CONTROLLABILITY WITH COLLECTIVE OR CYCLIC WAS NOT AVAILABLE. THE HELICOPTER IMPACTED THE GROUND SLIDING RIGHT AND TURNING LEFT RESULTING IN IT ROLLING ON ITS RIGHT SIDE.
NTSB Probable Cause
FAILURE OF THE PILOT TO MAINTAIN PROPER VISUAL LOOKOUT PRIOR TO AND DURING DEPARTURE.
Full Narrative
PRIOR TO DEPARTURE FROM AN UNIMPROVED HELICOPTER LANDING PAD THE PILOT FAILED TO ASSURE REQUIRED CLEARANCE FROM OBSTACLES POSITIONED ALONG HIS ROUTE OF DEPARTURE. THE HELICOPTER STRUCK A SINGLE ELECTRICAL POWER LINE RESULTING IN LOSS OF CONTROL DUE TO THE CONTROL RODS BEING SEVERED. A FORCED LANDING WAS PERFORMED BY REDUCING THE ENGINE POWER, HOWEVER, CONTROLLABILITY WITH COLLECTIVE OR CYCLIC WAS NOT AVAILABLE. THE HELICOPTER IMPACTED THE GROUND SLIDING RIGHT AND TURNING LEFT RESULTING IN IT ROLLING ON ITS RIGHT SIDE.
Flight
Event TypeAccident
Event Time17:30 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftMcdonnell Douglas 369E
Tail NumberN381F
Aircraft CategoryHeli
DamageSubstantial
OperatorOklahoma City Police
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft · 420
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 43 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 8 kt
Visibility20 sm
CeilingOvercast 25000 ft
Temperature / Dew Point59
Altimeter30.00 inHg
Observation Time21:50
Weather SourceWFAC