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NTSB Report
July 16, 1993 · Glasflugel Standard Libell Standard L · N4362
Boulder, CO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
July 16, 1993
Injury Outcomes
1 injury (1 minor injury)
Location
Boulder, CO
Aircraft
Glasflugel Standard Libell Standard L
Tail Number
N4362
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN93LA080
ACCORDING TO THE PILOT, DURING INITIAL CLIMB FOLLOWING TAKEOFF, WHILE UNDER TOW ON A GLIDER FLIGHT, THE SPOILERS DEPLOYED AND COULD NOT BE RETRACTED. THE PILOT RELEASED FROM THE TOW AND ATTEMPTED TO RETURN TO THE AIRPORT. THE GLIDER IMPACTED IN A FIELD APPROXIMATELY 1/2 MILE SHORT OF THE RUNWAY. THE PILOT STATED THAT THE SPOILERS HAD BEEN MISRIGGED.
NTSB Probable Cause
IMPROPER RIGGING OF THE SPOILER SYSTEM BY MAINTENANCE PERSONNEL, WHICH CAUSED AN UNCOMMANDED SPOILER DEPLOYMENT AND PREVENTED SPOILER RETRACTION BY THE PILOT. A FACTOR WAS UNSUITABLE TERRAIN FOR A FORCED LANDING
Full Narrative
On July 16, 1993, at 1330 mountain daylight time, a Glasfugel Standard Libell glider, N4362, impacted the ground near the Boulder, Colorado, Airport. The pilot received minor injuries and the glider sustained substantial damage. Visual meteorological conditions prevailed for this personal flight which originated at the Boulder Airport. According to the pilot, the spoilers deployed during takeoff and could not be retracted due to improper rigging. The pilot said he released from the tow and attempted to return to the airport. The aircraft impacted in a field across the street from the landing area. The wings had been removed prior to examination of the aircraft and verification of spoiler rigging could not be conducted.
Flight
Event TypeAccident
Event Time13:30 MDT
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGlasflugel Standard Libell Standard L
Tail NumberN4362
Aircraft CategoryGli
DamageSubstantial
Operating RulePart 91
Engines0
Engine TypeUnknown
Engine DetailsUnknown
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 66 · None
Conditions
ConditionsVMC
LightDaylight
Wind10° @ 6 kt
Visibility75 sm
CeilingBroken clouds 20000 ft
Temperature / Dew Point57
Altimeter29.00 inHg
Observation Time18:52
Weather SourceWFAC