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NTSB Report
May 4, 1992 · Let L-13 · N99946
Boynton Beach, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 4, 1992
Injury Outcomes
1 injury (1 minor injury)
Location
Boynton Beach, FL
Aircraft
Let L-13
Tail Number
N99946
Operator
Willis B N
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MIA92LA122
THE FLT TURNED BASE WITH PARTIAL SPOILERS EXTENDED THEN TURNED FINAL, & ENCOUNTERED A 'SEVERE DOWNDRAFT.' THE PLT RETRACTED THE SPOILERS BUT THE DESCENT CONTINUED UNTIL IMPACT WITH TREES APPROXIMATELY 300 FT SHORT OF THE RWY. HE HAD ACCUMULATED 3 HRS TOTAL TIME MAKE & MODEL DURING 8 DUAL & 12 SOLO FLIGHTS IN THE PRECEDING 30 DAYS.
NTSB Probable Cause
PREMATURE EXTENSION OF THE SPOILERS BY THE PILOT DURING APPROACH TO LAND. CONTRIBUTING TO THE ACCIDENT WAS HIS LACK OF TOTAL EXPERIENCE IN THE TYPE OF AIRCRAFT AND IN-FLIGHT ENCOUNTER WITH A DOWNDRAFT.
Full Narrative
THE FLT TURNED BASE WITH PARTIAL SPOILERS EXTENDED THEN TURNED FINAL, & ENCOUNTERED A 'SEVERE DOWNDRAFT.' THE PLT RETRACTED THE SPOILERS BUT THE DESCENT CONTINUED UNTIL IMPACT WITH TREES APPROXIMATELY 300 FT SHORT OF THE RWY. HE HAD ACCUMULATED 3 HRS TOTAL TIME MAKE & MODEL DURING 8 DUAL & 12 SOLO FLIGHTS IN THE PRECEDING 30 DAYS.
Flight
Event TypeAccident
Event Time16:00 EDT
Nearest AirportWillis Gliderport (1nm E)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftLet L-13
Tail NumberN99946
Aircraft CategoryGli
DamageSubstantial
OperatorWillis B N
Operating RulePart 91
Engines0
Engine TypeUnknown
Engine DetailsUnknown
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 39 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind260° @ 10 kt, gusting 17 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point52
Altimeter29.00 inHg
Observation Time19:50
Weather SourceWFAC