What was found
(CAN) DURING FLIGHT CREW ACTIVATED GEARDOWN AND FLAPS DOWN FOR TEST, NOTHING MOVED, FE NOTICED HYD RESEVOIR WAS EMPTY, EMER DECLARED, LG MANUALLY LOWERED AND AUX PUMP USED FOR LANDING. HYD RETURN LINE ON NO 2 ENG UNDER LH WING SAIL BOAT FARING HAD A HOLE IN THE TUBE CAUSED BY BROKEN P CLAMP AND THE LINE CHAFFED AGAINST BULKHEAD HOLDING P CLAMP. REPAIRED.