What was found
RIGHT T/E FLAP ANGLE TEE GEARBOX RATTLES AND CHATTERS THROUGHOUT RIGHT SIDE, UNABLE TO LOCATE SOURCE OF PROBLEM, LEFT SIDE IS SMOOTH AND QUIET, HYD POWER OR ELECTRIC MAKES NO DIFFERENCE, BUT SOUND IS MUCH LOUDER WITH ELECTRIC MOTOR. SUSPECT WORN OUTPUT GEAR ON ANGLE TEE BOX IS CAUSING THE PROBLEM. RT T/E FLAP ANGLE TEE GEARBOX RATTLES AND CHATTERS THROUGHOUT RT SIDE, UNABLE TO LOCATE SOURCE OF PROBLEM, LT SIDE IS SMOOTH & QUIET, HYD POWER OR ELECTRIC MAKES NO DIFFERENCE, BUT SOUND IS MUCH LOUDER WITH ELECTRIC MOTOR. SUSPECT WORN OUTPUT GEAR ON ANGLE TEE BOX IS CAUSING PROBLEM.