BRIGHTON, CO, USA
N2801Z
PIPER PA-22-160
AFTER ENTERING THE LANDING PATTERN, THE PLT NOTED BINDING OF THE AILERON CONTROL SYSTEM. REPORTEDLY THE AILERON CONTROLS SEEMED TO LOCK, SO HE USED THE RUDDERS FOR DIRECTIONAL CONTROL & LANDED IN A PLOWED FIELD. DURING THE LANDING, THE ACFT NOSED OVER. AN EXAM REVEALED THAT THE PIPER AUTO CONTROL SYS (WING LEVELER) HAD BECOME ENGAGED. WITH THE WING LEVELER ENGAGED, AN EXTRAORDINARY AMOUNT OF CONTROL FORCE WAS REQUIRED TO OVERCOME A GEAR SYS. THE PLT BELIEVED THAT THE WING LEVELER CONTROL, PN 751-519, VIBRATED INTO THE ENGAGED POSITION.
Source: NTSB Aviation Accident Database
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