As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ABORTED TAKEOFF AT LESS THAN 40 KNOTS DUE TO ASYMETRICAL THRUST RIGHT ENGINE SLOWER TO SPOOL. ATTEMPTED SECOND TAKEOFF BUT ENGINES CAME UP TOGETHER BUT FMA WOULDNT INDICATE FLEX DUE TO FMS BEING IN ENGINE OUT MODE. MAINTENANCE REPLACED FUEL FILTER PER AMM 73-12-42.