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NTSB Report
June 22, 2022 · Let L-23 Super Blanik · N364BA
Yoder, KS
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 22, 2022
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Yoder, KS
Aircraft
Let L-23 Super Blanik (2000)
Tail Number
N364BA
Operator
Civil Air Patrol
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
CEN22LA279
The flight instructor reported that after demonstrating maneuvers he noticed that the glider had quickly descended to pattern altitude, so he proceeded into the traffic pattern. He slowed the glider to minimum sink airspeed and then turned onto the base leg about 200 to 250 ft above ground level. During the base leg turn, the glider continued to turn and descend, and the flight instructor was unable to maintain control. The glider impacted terrain short of the runway and sustained substantial damage to the fuselage, empennage, and both wings. The flight instructor reported that there were no preimpact mechanical malfunctions or failures with the glider that would have precluded normal operation. The flight instructor reported that there was sinking air in the flight area.
NTSB Probable Cause
The pilot's encounter with sinking air conditions that resulted in a loss of lift and a subsequent loss of control.
Full Narrative
The flight instructor reported that after demonstrating maneuvers he noticed that the glider had quickly descended to pattern altitude, so he proceeded into the traffic pattern. He slowed the glider to minimum sink airspeed and then turned onto the base leg about 200 to 250 ft above ground level. During the base leg turn, the glider continued to turn and descend, and the flight instructor was unable to maintain control. The glider impacted terrain short of the runway and sustained substantial damage to the fuselage, empennage, and both wings. The flight instructor reported that there were no preimpact mechanical malfunctions or failures with the glider that would have precluded normal operation. The flight instructor reported that there was sinking air in the flight area.
Flight
Event TypeAccident
Event Time11:30 CDT
Nearest AirportSunflower Aerodrome Gliderport (1nm N)
Runway17
Runway Length7000 ft
Runway Width200 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftLet L-23 Super Blanik
Tail NumberN364BA
Aircraft CategoryGli
DamageSubstantial
OperatorCivil Air Patrol
Operating RulePart 91
Engines0
Seats2
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 15 · None · Minor
Crew 2Age 71 · Basc · Serious
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 10 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point70 F
Altimeter30.21 inHg
Observation Time11:52
Weather SourceWFAC