Narrative:

I believe that I have located the source of the water which is causing the emergency exit lighting (eel) lights in the main galley to fail. The employees of company X; a contracted aircraft cleaning service; who are our aircraft cleaners; have been observed pouring out the contents of one liter water bottles onto the galley floor mat and swishing the water around. The water will flow to the mat's edge and slip under the black rubber mat. Eventually the water will short out the feeder cable eel light outlet.

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Original NASA ASRS Text

Title: A Line Avionics Mechanic reports he continues to find emergency egress lighting (EEL) feeder cable connectors shorted out due to water or moisture collecting between the floor mat and the floor boards in the aft main galley area of their B747-400 aircraft. Many of the same EEL feeder cable connectors were also found smashed.

Narrative: I believe that I have located the source of the water which is causing the emergency exit lighting (EEL) lights in the main galley to fail. The employees of Company X; a contracted aircraft cleaning service; who are our aircraft cleaners; have been observed pouring out the contents of one liter water bottles onto the galley floor mat and swishing the water around. The water will flow to the mat's edge and slip under the black rubber mat. Eventually the water will short out the feeder cable EEL light outlet.

Data retrieved from NASA's ASRS site as of April 2012 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.