WDB HAS HYD LEAK; FUEL DUMP VALVE MALFUNCTION LIGHT. DIVERT LAND.

Narrative

DURING FLT SFO-CDG; CTR HYD SYS QUANTITY BEGAN TO LEAK. FLT DIVERTED TO JFK FOR MAINT. DURING DIVERT AND WITH ATC APPROVAL; FUEL DUMPED FROM C TANK OVER OHIO TO REDUCE WT TOWARDS MAX LNDG WT. DURING DUMP; OVERHEAD ANNUNCIATOR LIGHT SHOWED L DUMP VALVE NOT OPENED. FLC MEMBER WENT AFT AND VERIFIED BOTH DUMP VALVES OPENED AND DUMPING. FUEL DUMPED AND ACFT LANDED AT JFK BY ME 1500 LBS OVERWT. DURING MAINT WE; INCLUDING ME; ADVISED MAINT IN MAINT OFFICE OF OVERWT LNDG. THEY SAID THEY WOULD DO PROPER INSPECTION. WHEN DEPARTING JFK; TOLD MECH WE FORGOT TO WRITE UP OVERWT LNDG AND HE SAID NOT TO WORRY; INSPECTION ALREADY COMPLETED AND RECORDED. THEN DURING FLT JFK-CDG WE REALIZED WE'D NOT WRITTEN UP THE DUMP VALVE INDICATOR LIGHT MALFUNCTION. WE WROTE THIS UP GOING INTO PARIS. BOTH VALVES DUMPED SO WE WEREN'T QUITE AS CONCERNED AS WE SHOULD HAVE BEEN. WE FULLY INTENDED TO WRITE IT UP BUT THE REMAINDER OF THE FIRST LEG WITH REDUCED HYDS AND OTHER CONCERNS APPARENTLY PUT IT TO A LOWER PRIORITY IN OUR MINDS AND WE DIDN'T THINK OF IT AGAIN UNTIL JFK-CDG. TECHNICALLY; THE OVERWT SHOULD HAVE BEEN WRITTEN UP ALSO; BUT MAINT PERSONNEL INDICATED NO NEED AS THE INSPECTION WAS ALREADY COMPLETED AND RECORDED. SUPPLEMENTAL INFORMATION FROM ACN 252223: IN THE DUMP WE NOTICED THE L VALVE LIGHT ON. I WENT BACK TO CHK IT. IT WAS WORKING PROPERLY. WHEN WE LANDED IN JFK WE HAD TO PUT THE GEAR AND FLAPS DOWN WITH ALTERNATE SYS. MAINT SAID WE WOULDN'T HAVE TO BUT WE DID. AFTER LNDG; SYS WAS ABOUT 17 PERCENT OF NORMAL. WE GOT THE LEAK FIXED AND PROCEEDED TO CDG; FORGETTING TO WRITE UP THE DUMP VALVE LIGHT BECAUSE VALVE WORKED; IT JUST INDICATED IT DIDN'T. WE GOT TO PARIS. WE TOLD THE OUTBOUND CREW AND THEY SAID THE DUMP VALVE LIGHT WAS A NO-GO ITEM; SO BY THE TIME THEY GOT IT FIXED; THEY WERE OUT OF DUTY TIME SO THEY CANCELLED THE FLT.