What was found
(CAN) NR 2 HYD ISO VALVE FAULT CAUTION LIGHT DURING DESCENT AT FL150. QRH CHECK LIST PERFORMED ACCOMPANIED WITH ALTERNATE LANDING GEAR EXTENSION. NWS ALSO INOPERATIVE. UNEVENTFUL LANDING WITH CROSSWIND OF LESS THAN 10 KTS PERFORMED. RUNAWAY VACATED VIA HIGH SPEED TAXIWAY USING DIFFERENTIAL BRAKING AND POWER. LATER ON TOWED TO PARKING STAND WITH PASSENGERS ON BOARD WHERE DISEMBARKATION TOOK PLACE. FOUND HYD. LEAK ON NR 2 SYS NR 3 MLG BRAKE. REPLACED MLG BRAKE ASSY NEW MLG BRAKE, PN 2-1605-2, SN 1597.