Narrative:

Approximately 1 1/2 hours before landing in vhhh, the relief first officer reported to me that he had lost his navigation display. The CRT was blank and inoperative. This, in itself presents no serious problem. My concern is a possible connection to events that may have led up to this. Before departure, the purser said that there was a lot of water on the lavatory floor by door 1L. We contacted maintenance and they had it vacuumed. We asked if the problem had been fixed. (A previous write-up listed a problem with a drain mast) we were assured that everything was ok. Before departure, we called operations again and they verified that the problem was taken care of. Nothing specific. On climb, the purser reported that water was running out of the lavatory onto passenger shoes. Shortly after reaching cruise, the purser reported that 3 lavatories had wash basins overflowing. I called maintenance, and they gave us the option of turning off the valves under the sink. This would disable the faucets and the flight attendants would have to dump water into the toilets so they would flush. The carpets were so wet, they blocked off the lavatories. At approximately the same time that the first officer lost his CRT, the purser reported that all of the lavatories in first class and in business class were now inoperative. My concern was, where is all of the water going. I do not know if there is a connection between water possibly dripping or running into places unknown and the loss of some of my electronic instrumentation. If there is a possible connection, I would hope that these types of gripes on the ground would receive serious attention in spite of the high pressure on the ground people to get the flight out on time. Callback conversation with reporter revealed the following information: the reporter stated the water was leaking out of the forward lavatory into the first class and business section of the cabin and soaking the passenger shoes. The reporter said the fact that the first officersouth navigation display was lost may not be connected to the water leak, but should be considered. The reporter stated the airplane had wet carpets prior to departure and the only maintenance action was to vacuum the carpets. The reporter said the main concern is where is the water leaking to and in what compartment?

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Original NASA ASRS Text

Title: A B747-400 CAPT EXPRESSES CONCERN OVER THE LACK OF MAINT ACTION ON INTERIOR LAVATORY WATER LEAKS AND WHERE THE WATER IS LEAKING TO IN FLT.

Narrative: APPROX 1 1/2 HRS BEFORE LNDG IN VHHH, THE RELIEF FO RPTED TO ME THAT HE HAD LOST HIS NAV DISPLAY. THE CRT WAS BLANK AND INOP. THIS, IN ITSELF PRESENTS NO SERIOUS PROB. MY CONCERN IS A POSSIBLE CONNECTION TO EVENTS THAT MAY HAVE LED UP TO THIS. BEFORE DEP, THE PURSER SAID THAT THERE WAS A LOT OF WATER ON THE LAVATORY FLOOR BY DOOR 1L. WE CONTACTED MAINT AND THEY HAD IT VACUUMED. WE ASKED IF THE PROB HAD BEEN FIXED. (A PREVIOUS WRITE-UP LISTED A PROB WITH A DRAIN MAST) WE WERE ASSURED THAT EVERYTHING WAS OK. BEFORE DEP, WE CALLED OPS AGAIN AND THEY VERIFIED THAT THE PROB WAS TAKEN CARE OF. NOTHING SPECIFIC. ON CLB, THE PURSER RPTED THAT WATER WAS RUNNING OUT OF THE LAVATORY ONTO PAX SHOES. SHORTLY AFTER REACHING CRUISE, THE PURSER RPTED THAT 3 LAVATORIES HAD WASH BASINS OVERFLOWING. I CALLED MAINT, AND THEY GAVE US THE OPTION OF TURNING OFF THE VALVES UNDER THE SINK. THIS WOULD DISABLE THE FAUCETS AND THE FLT ATTENDANTS WOULD HAVE TO DUMP WATER INTO THE TOILETS SO THEY WOULD FLUSH. THE CARPETS WERE SO WET, THEY BLOCKED OFF THE LAVATORIES. AT APPROX THE SAME TIME THAT THE FO LOST HIS CRT, THE PURSER RPTED THAT ALL OF THE LAVATORIES IN FIRST CLASS AND IN BUSINESS CLASS WERE NOW INOP. MY CONCERN WAS, WHERE IS ALL OF THE WATER GOING. I DO NOT KNOW IF THERE IS A CONNECTION BTWN WATER POSSIBLY DRIPPING OR RUNNING INTO PLACES UNKNOWN AND THE LOSS OF SOME OF MY ELECTRONIC INSTRUMENTATION. IF THERE IS A POSSIBLE CONNECTION, I WOULD HOPE THAT THESE TYPES OF GRIPES ON THE GND WOULD RECEIVE SERIOUS ATTN IN SPITE OF THE HIGH PRESSURE ON THE GND PEOPLE TO GET THE FLT OUT ON TIME. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE WATER WAS LEAKING OUT OF THE FORWARD LAVATORY INTO THE FIRST CLASS AND BUSINESS SECTION OF THE CABIN AND SOAKING THE PAX SHOES. THE RPTR SAID THE FACT THAT THE FOS NAV DISPLAY WAS LOST MAY NOT BE CONNECTED TO THE WATER LEAK, BUT SHOULD BE CONSIDERED. THE RPTR STATED THE AIRPLANE HAD WET CARPETS PRIOR TO DEP AND THE ONLY MAINT ACTION WAS TO VACUUM THE CARPETS. THE RPTR SAID THE MAIN CONCERN IS WHERE IS THE WATER LEAKING TO AND IN WHAT COMPARTMENT?

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.