Widebody transport has hydraulic leak, fuel dump valve malfunction light. Divert land.

Attributes
ACN	252221
Time
Date	199309
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : dbq
State Reference	IA
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other landing other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time total : 12000 flight time type : 1200
ASRS Report	252221
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 7250 flight time type : 2500
ASRS Report	252223
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft

Narrative:

During flight sfo-cdg, center hydraulic system quantity began to leak. Flight diverted to jfk for maintenance. During divert and with ATC approval, fuel dumped from C tank over ohio to reduce weight towards maximum landing weight. During dump, overhead annunciator light showed left dump valve not opened. Flight crew member went aft and verified both dump valves opened and dumping. Fuel dumped and aircraft landed at jfk by me 1500 pounds overweight. During maintenance we, including me, advised maintenance in maintenance office of overweight landing. They said they would do proper inspection. When departing jfk, told mechanic we forgot to write up overweight landing and he said not to worry, inspection already completed and recorded. Then during flight 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 hydraulics 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 overweight should have been written up also, but maintenance personnel indicated no need as the inspection was already completed and recorded. Supplemental information from acn 252223: in the dump we noticed the left valve light on. I went back to check it. It was working properly. When we landed in jfk we had to put the gear and flaps down with alternate system. Maintenance said we wouldn't have to but we did. After landing, system 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 flight.

Original NASA ASRS Text

Title: 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.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.