As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4144 - CREW ELECTED TO ABORT TAKEOFF AFTER NOTICING AN RPM DROP TO 99 PERCENT RIGHT ENGINE, RETURNED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE CONDUCTED ENGINE GROUND RUNS IAW MM 71-00-00. WERE NOT ABLE TO DUPLICATE PROBLEM. AIRCRAFT RETURNED TO SERVICE.