What was found
(CAN) DURING FLIGHT CREW NOTICED NR 2 HYD SYSTEM FLUID LEVEL DROPPING AND OPTIONED TO RETURN TO DEPARTURE AIRPORT. ACFT LANDED WITHOUT ISSUES HOWEVER PERFORMED ABNORMAL STOP ON RUNWAY. MECHANIC FOUND, RESERVOIR NR 2 QTY INDICATION WAS ZERO. NO POP-UP OF EA INDICATION, PTU, EDP, CASE DRAIN AND PRESSURE, EACH FILTERS HAS NO CONTAMINATION, NO EXTERNAL LEAK IN THE RT NACELLE INCLUDING EDP CHASSIS BUT TSS ON THE NR 2 EDP WAS ALL BLACK WHICH MEAN WILL BE DRY RUN, HYD LEAKAGE AROUND RT ELEVATOR, RT NR 2 PCU PRESSURE LINE HOSE WAS DAMAGED. THERE WAS CHAFING SIGN BETWEEN THE HOSE AND WHITE PLASTIC PLATE ON THE PCU.