|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : dfw|
|Altitude||agl bound lower : 0|
agl bound upper : 24000
|Controlling Facilities||artcc : zfw|
|Operator||common carrier : air carrier|
|Make Model Name||MD-80 Series (DC-9-80) Undifferentiated or Other Model|
|Operating Under FAR Part||Part 121|
|Navigation In Use||Other|
|Flight Phase||cruise other|
ground : preflight
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Qualification||pilot : atp|
|Affiliation||company : air carrier|
|Function||flight crew : first officer|
|Qualification||pilot : commercial|
pilot : instrument
|Anomaly||aircraft equipment problem : less severe|
other anomaly other
|Independent Detector||other flight crewa|
|Resolutory Action||none taken : unable|
|Air Traffic Incident||other|
While being pushed back at dfw, the ground crew informed me that water was leaking from the potable water service panel. I asked the ground crew to check the panel valve. Shortly thereafter I was informed the panel was normal. Everything proceeded normally until we were informed by the #1 flight attendant that she could not make any coffee, this was at approximately 24000 ft. On the climb to 33000 ft. The lavatory sinks also would not pressurize. We suspected the water service panel valve was in the wrong position and that we may be venting water overboard, I decided to divert the flight to a station where we could check the valve, and dispatch decided to return us to dfw. My main concern was that water could freeze aft of the service panel and then break loose and foreign object damage the left engine. We did not have enough fuel to fly to yyz below the freezing level, so I felt a divert was necessary. We descended below the freezing level and returned to dfw where the valve was found in the vent position. No foreign object damage was found. The aircraft was svced and we proceeded uneventfully to yyz. The next time there is any doubt about the valve position, I will have the lavatory. Sinks checked for water flow before leaving the ramp.
Original NASA ASRS Text
Title: UNABLE TO PRESSURIZE POTABLE WATER TANK.
Narrative: WHILE BEING PUSHED BACK AT DFW, THE GND CREW INFORMED ME THAT WATER WAS LEAKING FROM THE POTABLE WATER SVC PANEL. I ASKED THE GND CREW TO CHK THE PANEL VALVE. SHORTLY THEREAFTER I WAS INFORMED THE PANEL WAS NORMAL. EVERYTHING PROCEEDED NORMALLY UNTIL WE WERE INFORMED BY THE #1 FLT ATTENDANT THAT SHE COULD NOT MAKE ANY COFFEE, THIS WAS AT APPROX 24000 FT. ON THE CLB TO 33000 FT. THE LAVATORY SINKS ALSO WOULD NOT PRESSURIZE. WE SUSPECTED THE WATER SVC PANEL VALVE WAS IN THE WRONG POS AND THAT WE MAY BE VENTING WATER OVERBOARD, I DECIDED TO DIVERT THE FLT TO A STATION WHERE WE COULD CHK THE VALVE, AND DISPATCH DECIDED TO RETURN US TO DFW. MY MAIN CONCERN WAS THAT WATER COULD FREEZE AFT OF THE SVC PANEL AND THEN BREAK LOOSE AND FOREIGN OBJECT DAMAGE THE L ENG. WE DID NOT HAVE ENOUGH FUEL TO FLY TO YYZ BELOW THE FREEZING LEVEL, SO I FELT A DIVERT WAS NECESSARY. WE DSNDED BELOW THE FREEZING LEVEL AND RETURNED TO DFW WHERE THE VALVE WAS FOUND IN THE VENT POS. NO FOREIGN OBJECT DAMAGE WAS FOUND. THE ACFT WAS SVCED AND WE PROCEEDED UNEVENTFULLY TO YYZ. THE NEXT TIME THERE IS ANY DOUBT ABOUT THE VALVE POS, I WILL HAVE THE LAVATORY. SINKS CHKED FOR WATER FLOW BEFORE LEAVING THE RAMP.
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.