What was found
DURING CLIMB FROM FL310 TO 350 ENG NR 3 SPOOLED BACK TO IDLE THRUST. THRUST LEVER HAD NO EFFECT. DURING RELIGHT ATTEMPT N2 WOULD NOT ACCELERATE ABOVE 11%, N1 30%, N2 10% OR PRESS 3 PSI TIME 2 HOURS. REMOVED AND REPLACED NR 3 ENG IAW MM 71-00, OPS CHECKS OK PER JRH 12.2 CHAPT 13.1 THRU 5.