What was found
ON CLIMBOUT AT APPROX FL260 MASTER CAUTION LIGHT ILLUMINATED. NR 1 ENG DRIVEN HYD PUMP LOW PRESS. LIGHT ILLUMINATED NR 1 HYDRAULIC QTY INDICATED 60 PERCENT MOMENTARILY, EVENTUALLY THIS READING RETURNED TO 106 PERCENT AND REMAINED STABLE RAN QRH CHECKLIST NR1 HYD ENG PUMP REMOVED NR 1 ENG EDP REF MM 29-11-11-000-802-002-2 THROUGH 29-11-11-000-802-002-2 P5 STEP 7 PUT CAPSON THE RETURN & CASE DRAIN BUT WILL NOT HOLD PRESSURE INSTALLED NR 1 ENG EDP IAW MM 29-11-11-400. OPS AND LEAK CHECK GOOD. ACCOMPLISHED TSR NR 0811960 FLUSHED OUT 'A' SYS HYD REF MM 29-11-00-170-801. OPS & LEAK CHECK GOOD.