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NTSB Report
April 24, 2016 · Burkhart Grob Flugzeugbau G103 TWIN Astir TWIN II · N40880
Marana, AZ
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
April 24, 2016
Injury Outcomes
1 injury (1 minor injury), 1 uninjured
Location
Marana, AZ
Aircraft
Burkhart Grob Flugzeugbau G103 TWIN Astir TWIN II (1983)
Tail Number
N40880
Operator
Tucson Soaring Club
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
GAA16CA205
According to the pilot, while maneuvering the glider about 2,900 feet above ground level, the pilot determined that the wind conditions were not conducive to sustain flight and turned toward the runway in order to establish an approach. He recalled that while maneuvering toward the runway, he encountered downdrafts and began to lose altitude rapidly. He reported that he issued a mayday call about ¾ of a statute mile from the runway, established a nose up attitude to decrease the airspeed, and the glider impacted the trees. The glider sustained substantial damage to the right wing and fuselage. The pilot reported that there were no mechanical failures or anomalies with the glider prior to or during the flight that would have prevented normal flight operation.
NTSB Probable Cause
The glider's loss of lift as a result of unfavorable wind conditions for glider operations, consequently resulting in a collision with trees.
Full Narrative
According to the pilot, while maneuvering the glider about 2,900 feet above ground level, the pilot determined that the wind conditions were not conducive to sustain flight and turned toward the runway in order to establish an approach. He recalled that while maneuvering toward the runway, he encountered downdrafts and began to lose altitude rapidly. He reported that he issued a mayday call about ¾ of a statute mile from the runway, established a nose up attitude to decrease the airspeed, and the glider impacted the trees. The glider sustained substantial damage to the right wing and fuselage. The pilot reported that there were no mechanical failures or anomalies with the glider prior to or during the flight that would have prevented normal flight operation.
Flight
Event TypeAccident
Event Time14:30 MST
Nearest AirportELTIRO (1nm SE)
Flight Plan FiledNone
Flight Plan ActivatedNo
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBurkhart Grob Flugzeugbau G103 TWIN Astir TWIN II
Tail NumberN40880
Aircraft CategoryGli
DamageSubstantial
OperatorTucson Soaring Club
Operating RulePart 91
Engines0
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury), 1 uninjured
Fatal0
Serious0
Minor1
Uninjured1
Total2
Crew 1Age 65 · None · None
Crew 2Minor
Conditions
ConditionsVMC
LightDaylight
Wind160° @ 6 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point63 F / 18 C
Altimeter29.87 inHg
Observation Time08:55
Weather SourceWFAC