What was found
ON APPROACH, PILOT SELECTED THE FLAP POSITION. THE RIGHT FLAP JAMMED AND TWISTED INTERFERRING WITH CONTROL OF THE RIGHT AILERON. PILOT LANDED WITHOUT INCIDENT. SUSPECT CAUSE WAS THE WING ATTACHING POINT SHOWED THE ROLLERS BEING LUBRICATED, BUT WERE WORN; THUS, FAILING, CAUSING FLAP TO BIND WHEN EXTENDED.