As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EEC-ON -OTA 15'C-WIND CALM ENG ANTI-ICE-OFF-30.08 WING ANTI-ICE-OFF REDUCE POWER TAKEOFF 8 FMC COMPUTED DIFFERENT N1 TARGET VALUES OF 0.7 ENG 1 89.8 ENG NR 2, 89.1. ACFT GROUNDED. PREFORMED FIM TASK 34-61-839, AND SUB TASK MM 34-61-00-730-001. NO DEFECTS FOUND NO HISTORY PAST 30 DAYS.