What was found
CONTROL COLUMN HAS A BUMP WHEN CYCLING ELEVATORS FROM NOSE DOWN TO UP. FOUND F/O'S AFT ELEVATOR QUADRANT LOOSE ON TORQUE SHAFT. SETTING UP TO START DISASSEMBLY OF F-O QUADRANT. REMOVED FASTENERS, APPLIED INSTRUCTION FROM MM 27-31-70 REPAIR 8-1. HOLES WERE ROUND AND WITHIN TOLERANCE PER FIG 601. NO CRACKS PER 757 NDT. MCDP CHECK REVEALED FAULT RUDDER SERVO-FCC. PULLED AND SECURED BREAKER E18 L FCC SERVO. REPLACED ARGS ELECTRO HYD SERVO VALVE. OPS CHECKS GOOD. TROUBLESHOT LT ELEVATOR PCU STATUS MESSAGE. REPLACED OTBD PCU ON LT ELEVATO, OPS & LEAK CHECKED GOOD. MESSAGE WENT AWAY. PERFORMED AUTOPILOT CAT-III AUTOLAND TEST PER MM. TEST PASSED, NO FAULTS. RETURNED AC TO CAT-III STATUS.