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NTSB Report
January 22, 1984 · Bell 206L-1 · N500CN
Huntington, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
January 22, 1984
Injury Outcomes
5 injuries (4 serious injuries, 1 minor injury), 2 uninjured
Location
Huntington, UT
Aircraft
Bell 206L-1
Tail Number
N500CN
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
DEN84FA073
WHILE IN A STABILIZED, OUT-OF-GROUND-EFFECT HOVER, AT ABOUT 300 FEET AGL, THE HELICOPTER STARTED AN UNCONTROLLABLE RIGHT TURN. THE PLT STATED THAT USING FULL LEFT PEDDLE HAD NO EFFECT ON STOPPING THE SPIN. AT THE ONSET OF THE SPIN, THE OCCUPANTS OF THE ACFT FELT A HIGH FREQUENCY VIBRATION. THE PLT STATED THAT HE REDUCED THE ROTOR RPM BY ROLLING OFF THE THROTTLE & LOWERED THE COLLECTIVE. THE HELICOPTER DESCENDED INTO TREES IN A RIGHT SPIN. THE PLT STATED THAT HE DID NOT BELIEVE THAT THERE WAS ANYTHING MECHANICALLY WRONG WITH THE ACFT. THE COPLT STATED THAT HE FELT THAT THEY HAD EXPERIENCED A LOSS OF TAILROTOR AUTHORITY. INVESTIGATION REVEALED NO MECHANICAL PROBLEMS WITH THE HELICOPTER. REVIEW OF HEIGHT-VELOCITY CHART FOR THE BELL 206L-1 INDICATED THAT A SUCCESSUL AUTO-ROTATION FROM HOVER A 300 FEET AGL IS NOT PROBABLE. THE ELEVATION OF THE CRASH SITE WAS APRX 6800 FT MSL.
Full Narrative
WHILE IN A STABILIZED, OUT-OF-GROUND-EFFECT HOVER, AT ABOUT 300 FEET AGL, THE HELICOPTER STARTED AN UNCONTROLLABLE RIGHT TURN. THE PLT STATED THAT USING FULL LEFT PEDDLE HAD NO EFFECT ON STOPPING THE SPIN. AT THE ONSET OF THE SPIN, THE OCCUPANTS OF THE ACFT FELT A HIGH FREQUENCY VIBRATION. THE PLT STATED THAT HE REDUCED THE ROTOR RPM BY ROLLING OFF THE THROTTLE & LOWERED THE COLLECTIVE. THE HELICOPTER DESCENDED INTO TREES IN A RIGHT SPIN. THE PLT STATED THAT HE DID NOT BELIEVE THAT THERE WAS ANYTHING MECHANICALLY WRONG WITH THE ACFT. THE COPLT STATED THAT HE FELT THAT THEY HAD EXPERIENCED A LOSS OF TAILROTOR AUTHORITY. INVESTIGATION REVEALED NO MECHANICAL PROBLEMS WITH THE HELICOPTER. REVIEW OF HEIGHT-VELOCITY CHART FOR THE BELL 206L-1 INDICATED THAT A SUCCESSUL AUTO-ROTATION FROM HOVER A 300 FEET AGL IS NOT PROBABLE. THE ELEVATION OF THE CRASH SITE WAS APRX 6800 FT MSL.
Flight
Event TypeAccident
Event Time11:30 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206L-1
Tail NumberN500CN
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C28B · Turboshaft · 500
Seats7
People & Injuries
Injury Summary5 injuries (4 serious injuries, 1 minor injury), 2 uninjured
Fatal0
Serious4
Minor1
Uninjured2
Total7
Crew 1Age 33 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180°
Visibility15 sm
CeilingNone
Temperature / Dew Point19 C / 0 C
Altimeter0
Weather SourcePILO