As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAKEOFF ROLL, THE NR 1 ENGINE WOULD NOT REACH TAKEOFF POWER. THE TAKEOFF WAS ABORTED AT 90KTS. DURING TAXI AFTER THE ABORTED TAKEOFF A BRAKE FIRE WAS REPORTED. MULTIPLE TIRES AND BRAKES WERE REPLACED. MAINTENANCE REPLACED THE NR 1 ENGINE POWER LEVER MIXING BOX AS CORRECTIVE ACTION FOR THE FAILURE TO REACH TAKEOFF POWER. ENGINE OPERATION WAS THEN REPORTED AS NORMAL.