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NTSB Report
July 25, 1992 · Burkhart Grob G103 · N2135R
Knoxville, TN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 25, 1992
Injury Outcomes
1 injury (1 serious injury), 1 uninjured
Location
Knoxville, TN
Aircraft
Burkhart Grob G103
Tail Number
N2135R
Operator
Robert L Davis
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
MIA92LA153
SHORTLY AFTER TAKEOFF, PILOT WAS ATTEMPTING TO INSTRUCT REAR SEAT PASSENGER, WHO DID NOT SPEAK ENGLISH, HOW TO OPEN AIR VENT. THE PASSENGER INADVERTENTLY PULLED THE TOW CABLE RELEASE AND THE GLIDER DISCONNECTED FROM THE TOW AIRCRAFT AT 150 FEET. THE PILOT ATTEMPTED TO TURN BACK TO THE AIRPORT, BUT WAS UNABLE TO MAKE THE RUNWAY BEFORE LANDING ON A GRASSY SLOPE, AND GROUND LOOPING, AT WHICH TIME THE AIRCRAFT COLLIDED WITH TREES.
NTSB Probable Cause
THE PILOT-IN-COMMAND'S FAILURE TO PROPERLY INSTRUCT THE PASSENGER ON AIRCRAFT CONTROLS PRIOR TO TAKEOFF, RESULTING IN THE PASSENGER INADVERTENTLY RELEASING THE TOW CABLE AS THE GLIDER WAS BEING TOWED THROUGH 150 FEET.
Full Narrative
SHORTLY AFTER TAKEOFF, PILOT WAS ATTEMPTING TO INSTRUCT REAR SEAT PASSENGER, WHO DID NOT SPEAK ENGLISH, HOW TO OPEN AIR VENT. THE PASSENGER INADVERTENTLY PULLED THE TOW CABLE RELEASE AND THE GLIDER DISCONNECTED FROM THE TOW AIRCRAFT AT 150 FEET. THE PILOT ATTEMPTED TO TURN BACK TO THE AIRPORT, BUT WAS UNABLE TO MAKE THE RUNWAY BEFORE LANDING ON A GRASSY SLOPE, AND GROUND LOOPING, AT WHICH TIME THE AIRCRAFT COLLIDED WITH TREES.
Flight
Event TypeAccident
Event Time15:12 EDT
Nearest AirportDowntown Island Airport (1nm W)
Runway26
Runway Length3500 ft
Runway Width150 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBurkhart Grob G103
Tail NumberN2135R
Aircraft CategoryGli
DamageSubstantial
OperatorRobert L Davis
Operating RulePart 91
Engines0
Engine TypeUnknown
Engine DetailsUnknown
Seats2
People & Injuries
Injury Summary1 injury (1 serious injury), 1 uninjured
Fatal0
Serious1
Minor0
Uninjured1
Total2
Crew 1Age 41 · Unknown
Conditions
ConditionsVMC
LightDaylight
Wind300° @ 3 kt
Visibility10 sm
CeilingBroken clouds 12000 ft
Altimeter30.00 inHg
Observation Time20:52
Weather SourceWFAC