What was found
(CAN) DURING CLIMB, 10 MIN. AFTER TAKE OFF, CLOSE TO 25 000 FT, PILOT NOTICED NR 2 ENGINE HYD PUMP CAUTION LIGHT FOLLOWED BY A LOSS OF NR 2 HYD FLUID QTY ON COCKPIT GAUGE. PILOT FOLLOWED Q400 QUICK REF HANDBOOK PROCEDURE NR 12.5. PTU HAS BEEN MANUALLY SELECTED ON WITH NO PRESSURE INCREASE IN NR 2 SYST DUE NO HYD FLUID, PTU SELECTED OFF, NR 2 HYD ISOLATION VALVE SELECTED ON. AC RETURNED AND ALTERNATE LANDING GEAR EXTENSION PROCEDURE USED. NR 2 ENGINE DRIVE HYD PUMP R & R IAW AMM. NR 2 HYD SYS BLEED IAW AMM AND NR 2 HYD SYS SERVICE IAW AMM. AC RETURN TO MAINT BASE. ENGINE DRIVE HYD PUMP DETAIL FINDING REPORT WILL FOLLOW.