What was found
NR 1 PEC CAUTION LIGHT AND POWERPLANT MESSAGE RECEIVED DURING TAKEOFF ROLL AT 30 KNOTS. ABORTED TAKEOFF. DURING ABORTED TAKEOFF, RECEIVED A NR1 AC GENERATOR CAUTION LIGHT, AND AFTER CLEAR OF THE RUNWAY NOTICED THE NP TO BE AT 200. FOUND FAULT CODES 260 CHANNEL A AND 236 CHANNEL B ON NR1 ENGINE. C/W FIM TASKS 61-20-06-810-818 AND 61-20-05-810-822. PCU HAS HAD PROBLEMS ON OTHER ACFT. REPLACED PCU IAW AMM 61-20-11-000-801. ENGINE RUNS CHECK GOOD, NO LEAKS NOTED. ACFT RETURNED TO SERVICE.