What was found
RECEIVED HYD 1 LO PSI AT 500 FT AGL. C/W QRH. MESSAGE PERSISTED, WITH 0 PIS AND "--" % READOUT. RETURNED TO MLI. SHUT DOWN #1 ENGINE AFTER LANDING. HYD 1 LOW PSI RAN FOR 25 MINS. AIRCRAFT REMOVED FROM SERVICE. VISUALLY INSPECTED #1 HYD RESERVOIR QUANTITY GAUGE. RESERVOIR GAUGE READS 0%. INSPECTED AIRCRAFT FOR EVIDENCE OF HYD LEAK. FOUND TWO HYDRAULIC FLEX LINES IN RH MLG WHEEL WELL CHAFFING AND CAUSING LEAK. REF 323370-2 - 4 FOR ADDITIONAL WRITE-UPS. INSTALLED OB GND SPOILER HOSE ASSY IAW AMM 20-22-01. LEAK CHECK GOOD . INSTALLED RETURN HOSE ASSY IAW AMM 20-22-01. LEAK CHECK GOOD. C/W AMM 05-51-33-210-801 3D. NO DEFECTS NOTED.