As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TAKE OFF NR 2 ENGINE SPEED UP WAS SLOW ON APPROACH NR 2 ENGINE WAS 15 TO 20 PERCENT LOWER THAN NR 1 ENGINE AND THROTTLE LEVERS WERE EVEN. MAIN ENGINE CONTROL REPLACED. LEAK CHECK CARRIED OUT AND IDLE RUN CARRIED OUT, ALL PARAMETERS CHECKED WITHIN LIMITS.