As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPLICATION OF POWER FOR TAKEOFF, NR 2 ENGINE WOULD NOT REACH TAKEOFF POWER TARGET. FLIGHT CREW ELECTED TO RETURN TO GATE FOR MAINTENANCE. AIRCRAFT RETURNED TO GATE WITHOUT INCIDENT. MAINTENANCE PERSONNEL REPLACED 'MAIN ENGINE CONTROL' (MEC). GROUND RUNS COMPLETED WITH NO FAULTS NOTED. AIRCRAFT RETURNED TO SERVICE. (X)