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NTSB Report
March 10, 1988 · Bell 206B · N13Q
Cahokia, IL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 10, 1988
Injury Outcomes
No injuries (2 uninjured)
Location
Cahokia, IL
Aircraft
Bell 206B
Tail Number
N13Q
Operator
Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI88DCA01
THE INSTRUCTOR WAS GIVING A PILOT AN EMPLOYMENT EVALUATION IN THE HELICOPTER WHEN DURING THE STARTUP THE PILOT PREMATURELY ADDED FULL POWER CAUSING THE HELICOPTER TO ROTATE RAPIDLY TO THE RIGHT. THE HELICOPTER HAD BEEN POSITIONED ON A TRAILER. DURING THE UNCONTROLLED ROTATION IT STRUCK A TRACTOR, ATTACHED TO THE TRAILER, WITH THE TAIL ROTOR. THE HELICOPTER CAME TO REST A FEW FEET FROM THE TRAILER AFTER THE MAIN ROTOR ASSEMBLY BROKE AWAY FROM THE HELICOPTER. THE TORQUE GAUGE IN THE HELICOPTER INDICATED IN EXCESS OF 100%.
Full Narrative
THE INSTRUCTOR WAS GIVING A PILOT AN EMPLOYMENT EVALUATION IN THE HELICOPTER WHEN DURING THE STARTUP THE PILOT PREMATURELY ADDED FULL POWER CAUSING THE HELICOPTER TO ROTATE RAPIDLY TO THE RIGHT. THE HELICOPTER HAD BEEN POSITIONED ON A TRAILER. DURING THE UNCONTROLLED ROTATION IT STRUCK A TRACTOR, ATTACHED TO THE TRAILER, WITH THE TAIL ROTOR. THE HELICOPTER CAME TO REST A FEW FEET FROM THE TRAILER AFTER THE MAIN ROTOR ASSEMBLY BROKE AWAY FROM THE HELICOPTER. THE TORQUE GAUGE IN THE HELICOPTER INDICATED IN EXCESS OF 100%.
Flight
Event TypeAccident
Event Time10:45 CST
Nearest AirportSt. Louis Downtown (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206B
Tail NumberN13Q
Aircraft CategoryHeli
DamageSubstantial
OperatorHelicopters
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · C250-C20B · Turboshaft · 317
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 40 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind9° @ 14 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point46 / 0 C
Altimeter29.00 inHg
Observation Time16:45
Weather SourceWFAC