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NTSB Report
September 2, 1989 · Bell 47G · N182JR
Ozark, MO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 2, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Ozark, MO
Aircraft
Bell 47G
Tail Number
N182JR
Operator
Dick Hill Int Flight School
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MKC89LA195
WHILE PRACTICING AUTOROTATION LANDINGS, THE TAIL BOOM BEGAN TO RISE AFTER TOUCHDOWN WHICH RESULTED IN THE HELICOPTER ROLLING TO THE RIGHT AND THE MAIN ROTOR BLADES STRIKING THE TERRAIN. THE HELICOPTER CAME TO REST ON IT'S RIGHT SIDE. ACCIDENT INVESTIGATION REVEALED THAT THE RIGHT SKID, FORWARD OF THE FRONT UPRIGHT HAD FRACTURED. THE BROKEN PORTION OF THE SKID HAD CUT A GROOVE IN THE GRASS A DISTANCE OF ABOUT 2 FEET BEFORE IMBEDDING ITSELF, CAUSING THE HELICOPTER TO STOP. THE FORWARD INERTIA BOUGHT THE TAIL BOOM UP WHICH RESULTED IN THE ROTOR STRIKE AND ROLL OVER.
NTSB Probable Cause
THE FAILURE OF THE DUAL STUDENT TO PROPERLY FLARE DURING AN AUTOROTATIVE LANDING RESULTING IN A HARD LANDING AND PARTIAL FAILURE OF THE RIGHT SKID. THE CFI ALSO FAILED TO PROPERLY MONITOR THE STUDENT'S ACTIONS ON THE FLIGHT CONTROLS.
Full Narrative
WHILE PRACTICING AUTOROTATION LANDINGS, THE TAIL BOOM BEGAN TO RISE AFTER TOUCHDOWN WHICH RESULTED IN THE HELICOPTER ROLLING TO THE RIGHT AND THE MAIN ROTOR BLADES STRIKING THE TERRAIN. THE HELICOPTER CAME TO REST ON IT'S RIGHT SIDE. ACCIDENT INVESTIGATION REVEALED THAT THE RIGHT SKID, FORWARD OF THE FRONT UPRIGHT HAD FRACTURED. THE BROKEN PORTION OF THE SKID HAD CUT A GROOVE IN THE GRASS A DISTANCE OF ABOUT 2 FEET BEFORE IMBEDDING ITSELF, CAUSING THE HELICOPTER TO STOP. THE FORWARD INERTIA BOUGHT THE TAIL BOOM UP WHICH RESULTED IN THE ROTOR STRIKE AND ROLL OVER.
Flight
Event TypeAccident
Event Time12:15 CDT
Nearest AirportAir Park South (0nm N)
Runway17
Runway Length800 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 47G
Tail NumberN182JR
Aircraft CategoryHeli
DamageSubstantial
OperatorDick Hill Int Flight School
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6V-335-53 · Reciprocating · 210
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 47 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind60° @ 5 kt
Visibility7 sm
CeilingOvercast 1200 ft
Temperature / Dew Point70 F
Altimeter0
Observation Time17:15
Weather SourceWFAC