What was found
ABORTED TAKEOFF BELOW 60 KTS FOR "POWERPLANT" MESSAGE. NOTICED THE MESSAGE AS WE TOOK CTRLINE AND POWER LEVERS ADVANCED JUST ABOVE FLIGHT IDLE. RETURNED TO THE GATE. INTEROGATED CDS FOUND FAULT CODES ON P-PLANT 1 CH A 14,28,30,456. CH B 794. POWERPLANT 2 CH A 456, CH B 456. AFTER CLEARING FAULTS, 30 ON P-PLANT 1 CH A AND 794 CH B REMAINED HARD FAULTED. (PEC TO FADEC COMMUNICATION). UPON REMOVAL OF CONNECTORS TO PEC FOUND EVIDENCE OF CONTAMINATION ON ALL PEC CONNECTORS. CLEANED & RECONNECTED CONNECTORS TO PEC, FAULTS 30 & 794 CLEARED. PERFORMED 2 ENGINE STARTS, NO FAULTS LOGGED. DEFERRED ENGINE TREND DOWNLOAD AND SHRINK WRAP INSTALL. RETURNED TO SERVICE.