As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRL - FLT 6721 - PHD-FAT, ABORTED TAKEOFF, NR 1 ENGINE REV UNSAFE MSG ON TAKEOFF ROLL. AIRCRAFT RETURNED TO GATE, MAINTENANCE TROUBLESHOT AND APPLIED MEL 78-30-01 AND RETURNED AIRCRAFT TO SERVICE. MAINTENANCE REPLACED THE ISOLATION CONTROL VALVE. (M)