What was found
(CAN) DURING APPROACH, THE NR 2 ENGINE HYDRAULIC PUMP, CAUTION LIGHT ILLUMINATED. CREW CLIMBED AND ENTERED THE HOLDING PATTERN AND ACTIONED THE QRH CHECKLIST, SUBSEQUENTLY WITH NO HYDRAULIC FLUID IN NR 2 SYS, AN ALTERNATE GEAR EXTENSION PROCEDURE WAS CARRIED OUT. PRESSURE MANIFOLD INLET UNION FOUND TO BE SHEARED. PRESSURE MANIFOLD REPLACED IAW 29-10-36 AMM. INSPECTION C/OUT IAW AMM NR 2 EDP REPLACED WITH SERVICEABLE ITEM IAW AMM 29-10-11. CASE DRAIN FILTER REPLACED IAW 29-10-26. RETRACTIONS C\OUT IAW 32-30-00 AMM. SYD 8-29-002, REFERENCED. THIS SYD ALLOWS THE REPLACEMENT OF THE AN815-10D FITTING FROM ALUMINUM TO STAINLESS STEEL FITTING ON THE HYD PRESSURE MANIFOLD.