What was found
EWR - FLT 0674 - THE B-HYDRAULIC SYSTEM LOW QUANTITY ILLUMINATED ON APPROACH TO DWR. THE 'A' AND 'B' SYSTEMS REMAINED AT 3,000 PSI WITH 2 GALLONS QUANTITY. THE GEAR AND FLAPS EXTENDED NORMALLY. THE QUANTITY WENT TO 1 GALLON WITH T/R ACTIVATED AND RETURNED TO 1.8 GALLONS WHERE IT REMAINED. ACFT LANDED WITHOUT INCIDENT. B-SYSTEM PRESSURE WENT TO ZERO AT THE GATE. MAINTENANCE FOUND AN A-SYSTEM PRESSURE LINE AND A B-SYSTEM SPOILER LINE, BOTH IN THE LT MLG WHEELWELL, CHAFED. BOTH LINES WERE REPLACED. PRESSURE AND LEAK CHECKS WERE GOOD. THE HYDRAULIC SYSTEM WAS SERVICED TO FULL. (X)