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NTSB Report
November 4, 2007 · Burkhart Grob G 103 TWIN II · N46009
Windham, NY
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
November 4, 2007
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Windham, NY
Aircraft
Burkhart Grob G 103 TWIN II
Tail Number
N46009
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
NYC08CA025
Both pilots were alternating flying duties in a Burkhart Grob G 103 Twin II glider. They had been soaring along a ridge for approximately 1 hour in non-turbulent wind. The rear seat pilot was flying on the upwind side of the ridge, about 500 feet above the summit, when a gust of wind suddenly forced the glider to the downwind side of the ridge, about 25 feet below the summit. The glider then impacted trees, sustained substantial damage, and both pilots were seriously injured. The reported wind at an airport about 25 miles northeast of the accident site, about the time of the accident, was 270 degrees at 6 knots. Examination of the glider did not reveal any preimpact mechanical malfunctions, nor did the pilots report any.
NTSB Probable Cause
An inadvertent encounter with a wind gust while maneuvering.
Full Narrative
Both pilots were alternating flying duties in a Burkhart Grob G 103 Twin II glider. They had been soaring along a ridge for approximately 1 hour in non-turbulent wind. The rear seat pilot was flying on the upwind side of the ridge, about 500 feet above the summit, when a gust of wind suddenly forced the glider to the downwind side of the ridge, about 25 feet below the summit. The glider then impacted trees, sustained substantial damage, and both pilots were seriously injured. The reported wind at an airport about 25 miles northeast of the accident site, about the time of the accident, was 270 degrees at 6 knots. Examination of the glider by a Federal Aviation Administration inspector did not reveal any preimpact mechanical malfunctions, nor did the pilots report any.
Flight
Event TypeAccident
Event Time13:45 EST
Nearest AirportFreehold Airport (10nm)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBurkhart Grob G 103 TWIN II
Tail NumberN46009
Aircraft CategoryGli
DamageSubstantial
Operating RulePart 91
Engines0
Seats2
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 72 · None · Serious
Crew 2Age 58 · Second Class · Minor
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 6 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point54 / 30 C
Altimeter29.79 inHg
Observation Time18:51
Weather SourceWFAC