What was found
DURING FLIGHT, LT AILERON WOULD NOT RESPOND TO CONTROLS. FOUND AFT LT ROD END BROKEN AT AFT SIDE OF LOCKNUT AND BEARING END FROZEN AND IMMOVABLE, EVEN AFTER REMOVAL. PILOT NOTICED AILERONS LOCKED ON GROUND WITH SEAT BELTS WITH LEFT AILERON DOWN POSITION WHEN TIED DOWN. ALSO, ROD END LOWER HALF WAS CORRODED. SUBMITTER RECOMMENDED NOT TO LOCK AILERONS IN THIS POSITION CAUSING OXYGEN TO BUILD-UP AROUND ROD END.