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NTSB Report
July 5, 1991 · Thorp T-18CW · N83MK
Wimberley, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 5, 1991
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Wimberley, TX
Aircraft
Thorp T-18CW
Tail Number
N83MK
Operator
James W French
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
FTW91LA117
DURING A LANDING ON A GRASS AIRSTRIP THE PILOT FAILED TO MAINTAIN RUNWAY ALIGNMENT ON TOUCHDOWN AND LOST CONTROL WHEN HIS LEFT MAIN WHEEL ENTERED LONG GRASS. LEFT WING CONTACTED 5 FOOT TALL WEEDS ADJACENT TO THE 40 FEET WIDE AIRSTRIP. THE AIRPLANE VEERED LEFT AND STRUCK A LARGE ANT MOUND RESULTING IN THE AIRPLANE GROUND LOOPING TO THE INVERTED POSITION. THE PILOT REPORTED THAT TOUCHDOWN OCCURRED TEN FEET LEFT OF RUNWAY CENTER.
NTSB Probable Cause
THE FAILURE OF THE AIRPORT PERSONNEL TO MAINTAIN THE AIRSTRIP IN AN OPERABLE CONDITION AND THE PILOTS FAILURE TO MAINTAIN RUNWAY ALIGNMENT ON TOUCHDOWN.
Full Narrative
DURING A LANDING ON A GRASS AIRSTRIP THE PILOT FAILED TO MAINTAIN RUNWAY ALIGNMENT ON TOUCHDOWN AND LOST CONTROL WHEN HIS LEFT MAIN WHEEL ENTERED LONG GRASS. LEFT WING CONTACTED 5 FOOT TALL WEEDS ADJACENT TO THE 40 FEET WIDE AIRSTRIP. THE AIRPLANE VEERED LEFT AND STRUCK A LARGE ANT MOUND RESULTING IN THE AIRPLANE GROUND LOOPING TO THE INVERTED POSITION. THE PILOT REPORTED THAT TOUCHDOWN OCCURRED TEN FEET LEFT OF RUNWAY CENTER.
Flight
Event TypeAccident
Event Time13:18 CDT
Nearest AirportWoodbreck (0nm N)
Runway15
Runway Length2200 ft
Runway Width40 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftThorp T-18CW
Tail NumberN83MK
Aircraft CategoryAir
DamageSubstantial
OperatorJames W French
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360 · Reciprocating · 180
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 50 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind140° @ 5 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time17:50
Weather SourceWFAC