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NTSB Report
May 28, 1990 · Rolladen-Schneider LSIF Sailplane LSIF Sailp · N17EW
Mayville, NY
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 28, 1990
Injury Outcomes
1 injury (1 minor injury)
Location
Mayville, NY
Aircraft
Rolladen-Schneider LSIF Sailplane LSIF Sailp
Tail Number
N17EW
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
NYC90LA114
THE PILOT HAD BEEN AIRBORNE FOR OVER TWO HOURS AND WAS MANEUVERED IN A LEFT TURN, IN A THERMAL WITH SOME TURBULENCE WHEN THE CONTROL STICK WENT FULL LEFT AND HE WAS UNABLE TO PULL THE STICK FREE AND REGAIN CONTROL OF THE GLIDER. HE JETTISONED THE CANOPY, EXITED THE GLIDER, AND DEPLOYED HIS PARACHUTE. THE GLIDER COLLIDED WITH TREES DURING ITS UNCONTROLLED DESCENT TO THE GROUND. POST CRASH EXAMINATION BY THE FAA DISCLOSED THE AILERON PUSH ROD ON THE LEFT WING WAS BENT IN AN UPWARD DIRECTION. THIS OCCURRED DURING DISASSEMBLY WHEN THE WINGS WERE REMOVED FOR STORAGE ON A TRAILER. THE TRAILING EDGE OF THE LEFT WING WAS ALLOWED TO DROP, WHICH BENT THE PUSH ROD UPWARD. WHEN THE CONTROL STICK WAS MOVED TO FULL LEFT, THE RIVET ON TOP OF THE AILERON PUSH ROD MADE CONTACT WITH THE COLLAR AROUND THE AILERON PUSH ROD AND THE AILERON CONTROL JAMMED.
NTSB Probable Cause
JAMMED FLIGHT CONTROLS IN FLIGHT DUE TO A BENT AILERON PUSH-ROD.
Full Narrative
THE PILOT HAD BEEN AIRBORNE FOR OVER TWO HOURS AND WAS MANEUVERED IN A LEFT TURN, IN A THERMAL WITH SOME TURBULENCE WHEN THE CONTROL STICK WENT FULL LEFT AND HE WAS UNABLE TO PULL THE STICK FREE AND REGAIN CONTROL OF THE GLIDER. HE JETTISONED THE CANOPY, EXITED THE GLIDER, AND DEPLOYED HIS PARACHUTE. THE GLIDER COLLIDED WITH TREES DURING ITS UNCONTROLLED DESCENT TO THE GROUND. POST CRASH EXAMINATION BY THE FAA DISCLOSED THE AILERON PUSH ROD ON THE LEFT WING WAS BENT IN AN UPWARD DIRECTION. THIS OCCURRED DURING DISASSEMBLY WHEN THE WINGS WERE REMOVED FOR STORAGE ON A TRAILER. THE TRAILING EDGE OF THE LEFT WING WAS ALLOWED TO DROP, WHICH BENT THE PUSH ROD UPWARD. WHEN THE CONTROL STICK WAS MOVED TO FULL LEFT, THE RIVET ON TOP OF THE AILERON PUSH ROD MADE CONTACT WITH THE COLLAR AROUND THE AILERON PUSH ROD AND THE AILERON CONTROL JAMMED.
Flight
Event TypeAccident
Event Time16:10 EDT
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRolladen-Schneider LSIF Sailplane LSIF Sailp
Tail NumberN17EW
Aircraft CategoryGli
DamageSubstantial
Operating RulePart 91
Engine TypeUnknown
Engine DetailsUnknown
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 38 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility15 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter29.00 inHg
Observation Time14:35
Weather SourcePILO