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NTSB Report
September 3, 1992 · Bell 206L3 · N911NM
Bayfield, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 3, 1992
Injury Outcomes
3 injuries (3 serious injuries)
Location
Bayfield, CO
Aircraft
Bell 206L3
Tail Number
N911NM
Operator
Air Methods
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
DEN92FA089
WHILE ATTEMPTING TO LAND IN ROUGH, ROCKY MOUNTAINOUS TERRAIN DURING A MEDIVAC FLIGHT, AT A PRESSURE ALTITUDE OF 9,830 FT, LOSS OF TAIL ROTOR EFFECTIVENESS OCCURRED, AND THE HELICOPTER DESCENDED RAPIDLY AND CRASHED ONTO ROCKS. THE HELICOPTER WAS OPERATING IN A PERFORMANCE LIMITED PORTION OF THE HOVER PERFORMANCE CHART AT THE TIME OF THE ACCIDENT.
NTSB Probable Cause
FAILURE OF THE PILOT-IN-COMMAND TO PROPERLY USE THE HELICOPTER'S PERFORMANCE DATA. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE: THE ADVERSE TERRAIN AND HIGH DENSITY ALTITUDE.
Full Narrative
WHILE ATTEMPTING TO LAND IN ROUGH, ROCKY MOUNTAINOUS TERRAIN DURING A MEDIVAC FLIGHT, AT A PRESSURE ALTITUDE OF 9,830 FT, LOSS OF TAIL ROTOR EFFECTIVENESS OCCURRED, AND THE HELICOPTER DESCENDED RAPIDLY AND CRASHED ONTO ROCKS. THE HELICOPTER WAS OPERATING IN A PERFORMANCE LIMITED PORTION OF THE HOVER PERFORMANCE CHART AT THE TIME OF THE ACCIDENT.
Flight
Event TypeAccident
Event Time18:45 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206L3
Tail NumberN911NM
Aircraft CategoryHeli
DamageSubstantial
OperatorAir Methods
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · C-30 · Turboshaft · 650
Seats4
People & Injuries
Injury Summary3 injuries (3 serious injuries)
Fatal0
Serious3
Minor0
Uninjured0
Total3
Crew 1Age 46 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind230° @ 12 kt, gusting 15 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point39 C
Altimeter30.00 inHg
Observation Time00:49
Weather SourceWFAC