What was found
TRAILING EDGE LIGHT ON DURING APPROACH AT POSITION 20. EXECUTED MISSED APPROACH. NEXT APPROACH FLAPS WORKED NORMALLY. *S/D* AN INTERMITTENT INTERNAL FAILURE IN THE TRAILING EDGE FLAP POWER DRIVE UNIT HYDRAULIC CONTROL VALVE MODULE ACTIVATED THE T/E FLAP FAILURE PROTECTION SYSTEM WHICH INHIBITS FLAP MOVEMENT. REPOSITIONING THE FLAP CONTROL LEVERS TO THE FULL RETRACT POSITION UNLATCHED THE FAILURE PROTECTION SYSTEM AND RESTORED FULL FLAP OPERATION. THE SUBJECT T/E FLAP PDU CONTROL VALVE WAS REMOVED, REPLACED, AND OPERATIONALLY CHECKED PER MM 27-51-32. ALL SYSTEMS CHECKED NORMAL.