NTSB Identification: FTW94LA189.
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Accident occurred Saturday, May 28, 1994 in MCKINNEY, TX
Probable Cause Approval Date: 12/07/1994
Aircraft: BEECH 35, registration: N3956N
Injuries: 3 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

WHILE ON FINAL APPROACH AT APPROXIMATELY 300 FEET AGL, THE AILERONS BECAME LOCKED AND THE PILOT WAS UNABLE TO RETURN THE AIRPLANE TO THE LEVEL FLIGHT ATTITUDE. THE AIRPLANE, CONFIGURED WITH THE LANDING GEAR AND FLAPS RETRACTED, ENTERED A LEFT SPIRAL, COMPLETING TWO 360 DEGREE TURNS PRIOR TO IMPACTING IN A WHEAT FIELD. INVESTIGATION REVEALED THAT A BRASS ALLOY FOREIGN OBJECT ENTERED THE INTERIOR OF THE CONTROL WHEEL THROUGH AN OPEN INSPECTION WINDOW IN THE BACK SIDE OF THE SINGLE THROWOVER TYPE CONTROL YOKE. THE FOREIGN OBJECT, WHICH WAS NOT RECOVERED, BECAME TRAPPED BETWEEN THE SPROCKET AND THE CHAIN, LOCKING THE AILERONS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE AILERONS BEING LOCKED BY A FOREIGN OBJECT.

Full narrative available

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