What was found
10 MIN INTO FLIGHT WE RECIEVED A HYD 1R PUMP OFF ALERT. THE HYD PAGE SHOWED THE RIGHT PUMP OFF WITH A 'T' OVER THE PUMP. ABOUT 3 MINUTES LATER WE SAW THE PRESSURE SPIKE TO 3800 AND WE RECIEVED A HYD 1 OFF ALERT. WITH BOTH PUMPS OFF WE STILL HAD ABOUT 2400 PSI AND A SLOW LEAK DEVELOPED. WHEN THE QUANTITY FELL TO LESS THAN 1 GALLON WE RECIEVED A HYD 1 FAIL ALERT. AMM: 29-11-20-4-1 MD11 FOUND L1 PUMP LEAKING FROM SHAFT SEAL OUT DRAIN MAST. R & R L1 & R1 EDP'S(DUE TO RUN W/O FLUID). CK'D & REPLACED ALL 4 FILTERS. NO CONTAMINATION FOUND. RESERV'D RESV. BLED SYS 1. PUMP/FILTER LK & OPS CK'S OK.