737 Flight Crew Operations Manual
Supplementary Procedures -
Airplane General, Emer. Equip.,
Doors, Windows
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SP.1.2 D6-27370-866-EGP
Flight deck access system switch ................................................. NORM
Guard - Down
Verify LOCK FAIL light extinguishes.
Water System Draining
Lavatory water supply selector valves .........................SUPPLY/DRAIN
Galley water supply shutoff valves ..................................... SUPPLY ON
The shutoff valve is found adjacent to each wet galley sink.
Drain line...............................................................Connect to drain ports
• below the main passenger entry door
• aft of the water service panel
Water service panel ..........................................................................Open
Tank drain valve handle .................................................................OPEN
Drains potable water tank and water system aft of the wings.
Forward lavatory drain valve .........................................................OPEN
Drain valve is found below the sink in the forward lavatory only.
Drain valves for coffee maker and
water boiler (if installed) ................................................................OPEN
All galley and lavatory water faucets ...............................................Open
Close faucets when water flow stops.
Accomplish the following items after verifying the potable water system
is empty:
Drain valves for coffee maker and
water boiler (if installed)................................................ CLOSED
Forward lavatory drain valve ......................................... CLOSED
Tank drain valve handle ................................................. CLOSED
Water service panel ...............................................................Close
Drain line ..........................................Disconnect from drain ports
May 15, 2008
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