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NTSB Report
June 4, 1990 · Schweizer SGS 1-26B · N2423W
Truckee, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 4, 1990
Injury Outcomes
1 injury (1 fatality)
Location
Truckee, CA
Aircraft
Schweizer SGS 1-26B
Tail Number
N2423W
Operator
Robert L Tanner
Injuries
Fatal
Aircraft Damage
Substantial
NTSB Number
LAX90LA208
THE STUDENT GLIDER PILOT RELEASED FROM THE TOW AIRPLANE WITHOUT COMMUNICATING WITH THE TOW PILOT. THE GLIDER PROCEEDED IN A NORTHEAST DIRECTION TOWARD THE LEE SIDE OF THE MOUNTAINS. THE SURFACE WIND WAS FROM THE SOUTHWEST. THE GLIDER WAS OBSERVED AT A LOW ALTITUDE DISAPPEARING OVER A RIDGE. THE AIRCRAFT STRUCK A 50 FT TREE ABOUT 10 FEET FROM THE TOP THEN COLLIDED WITH THE GROUND.
NTSB Probable Cause
THE PILOT'S IMPROPER DECISION TO RELEASE FROM THE TOW AIRPLANE AT AN INSUFFICIENT ALTITUDE ON THE LEE SIDE OF THE MOUNTAINS.
Full Narrative
THE STUDENT GLIDER PILOT RELEASED FROM THE TOW AIRPLANE WITHOUT COMMUNICATING WITH THE TOW PILOT. THE GLIDER PROCEEDED IN A NORTHEAST DIRECTION TOWARD THE LEE SIDE OF THE MOUNTAINS. THE SURFACE WIND WAS FROM THE SOUTHWEST. THE GLIDER WAS OBSERVED AT A LOW ALTITUDE DISAPPEARING OVER A RIDGE. THE AIRCRAFT STRUCK A 50 FT TREE ABOUT 10 FEET FROM THE TOP THEN COLLIDED WITH THE GROUND.
Flight
Event TypeAccident
Event Time15:03 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftSchweizer SGS 1-26B
Tail NumberN2423W
Aircraft CategoryGli
DamageSubstantial
OperatorRobert L Tanner
Operating RulePart 91
Engine TypeUnknown
Engine DetailsUnknown · UNKNOWN · Unknown
Seats1
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 68 · Unknown
Conditions
ConditionsVMC
LightDaylight
Wind210° @ 10 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT