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NTSB Report
July 4, 1993 · Berkshire Concept 70 · N29BW
Boynton Beach, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 4, 1993
Injury Outcomes
No injuries (1 uninjured)
Location
Boynton Beach, FL
Aircraft
Berkshire Concept 70
Tail Number
N29BW
Operator
Willis B N
Injuries
None
Aircraft Damage
Substantial
NTSB Number
MIA93LA150
AFTER BEING TOWED ALOFT, THE FLIGHT PROCEEDED WEST TO LOCATE THERMALS WHICH WERE REPORTED TO BE GOOD BY ANOTHER GLIDER PILOT. THE FLIGHT WAS ABOUT 4-5 MI WEST OF THE DEPARTURE AIRPORT, AT 1,900 FT, WHEN THE PILOT WAS UNABLE TO LOCATE THERMALS AND ELECTED TO RETURN TO THE AIRPORT. WHILE EN ROUTE HE ENCOUNTERED 'STRONG SINK.' HE THEN CONTINUED IN WHAT WAS DESCRIBED AS 'MILD SINK', AND HE REALIZED THAT HE WOULD BE UNABLE TO LAND AT THE DEPARTURE AIRPORT. HE MADE A FORCED LANDING IN THE EVERGLADES. AFTER TOUCHDOWN, THE GLIDER GROUND LOOPED AND CAME TO REST UPRIGHT.
NTSB Probable Cause
THE PILOT'S IMPROPER IN-FLIGHT PLANNING AND THE LACK OF ADEQUATE THERMAL LIFT.
Full Narrative
AFTER BEING TOWED ALOFT, THE FLIGHT PROCEEDED WEST TO LOCATE THERMALS WHICH WERE REPORTED TO BE GOOD BY ANOTHER GLIDER PILOT. THE FLIGHT WAS ABOUT 4-5 MI WEST OF THE DEPARTURE AIRPORT, AT 1,900 FT, WHEN THE PILOT WAS UNABLE TO LOCATE THERMALS AND ELECTED TO RETURN TO THE AIRPORT. WHILE EN ROUTE HE ENCOUNTERED 'STRONG SINK.' HE THEN CONTINUED IN WHAT WAS DESCRIBED AS 'MILD SINK', AND HE REALIZED THAT HE WOULD BE UNABLE TO LAND AT THE DEPARTURE AIRPORT. HE MADE A FORCED LANDING IN THE EVERGLADES. AFTER TOUCHDOWN, THE GLIDER GROUND LOOPED AND CAME TO REST UPRIGHT.
Flight
Event TypeAccident
Event Time13:30 EDT
Nearest AirportWillis Gliderport (2nm NW)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBerkshire Concept 70
Tail NumberN29BW
Aircraft CategoryGli
DamageSubstantial
OperatorWillis B N
Operating RulePart 91
Engines0
Engine TypeUnknown
Engine DetailsUnknown
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 51 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind80° @ 12 kt
Visibility10 sm
CeilingNone
Altimeter30.00 inHg
Observation Time16:56
Weather SourceWFAC