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