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overboard through the forward and aft potable water drain
ports.
Training Information Point
When you drain the potable water system, you must drain water
from these two areas:
* Water service panel
* Forward lavatory.
The water service panel lets you drain the water tank and aft
supply lines. The forward lavatory has a drain valve that lets
you drain the forward water supply lines.
WATER/WASTE - POTABLE WATER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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38-10-00-003
When you drain the potable water system, you must turn the
water supply shutoff valves in each lavatory to the SUPPLY ON
position. If you do not turn the water supply shutoff valve to the
SUPPLY ON position, water will not drain from the toilet or
lavatory faucets.
WARNING: IF THE POTABLE WATER SYSTEM IS NOT
DRAINED AT A MINIMUM OF ONE TIME EACH
THREE DAYS, THE GROWTH OF BACTERIA CAN
OCCUR. IF BACTERIA GROWTH CONTINUES, AND
YOU DRINK THE WATER, ILLNESS CAN OCCUR.
You must fully drain the potable water system before you add a
disinfectant or when you park the airplane in cold weather.
WARNING: SEAL THE CARGO COMPARTMENT WITH THE
LINING. OBEY THE INSTRUCTIONS IN THE
SPECIFIED PROCEDURE WHEN YOU INSTALL
THE LINING. IF YOU INSTALL THE LINING
INCORRECTLY, SMOKE CAN GET INTO THE
PASSENGER COMPARTMENT DURING A FIRE.
You must remove the cargo compartment lining to get access to
some of the potable water system components. Make sure you
correctly replace the lining when you are done.
WATER/WASTE - POTABLE WATER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-10-00-003
WATER/WASTE - POTABLE WATER - FUNCTIONAL DESCRIPTION
WATER/WASTE - POTABLE WATER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN ALL 38-10-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-10-00-003
THIS PAGE IS INTENTIONALLY LEFT BLANK
38-11-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The water service panel lets you fill the potable water system.
The water service panel also lets you drain the water tank and
part of the potable water system.
Location
The water service panel is at the aft section of the fuselage,
bottom right side. There are two snap-latches to open the water
service panel door.
Access to the inside of the water service panel is from the aft
cargo compartment. The water service panel is under the floor
on the aft right side of the cargo compartment.
Physical Description
The water service panel has these components:
* Fill/overflow valve handle
* Water tank drain valve handle
* Compressor cut-out switch
* Potable water fill fitting.
Functional Description
The water service hose connects to the potable water fill fitting.
The fill/overflow valve handle lets you open the fill/overflow
valve. The fill/overflow valve lets water fill the water tank. The
fill/overflow valve also lets air flow overboard from the tank
during the fill process. When the tank is at its maximum
capacity, water flows overboard through the overflow drain line
and potable water drain port.
To drain the tank, open the water tank drain valve. The open
water tank drain valve lets water flow out of the water tank and
the aft distribution lines.
The compressor cut-out switch stops operation of the air
compressor when the water service panel door is open.
Interference brackets on the water service panel door prevent
the door from closing if a valve handle is in the wrong position
for flight.
WATER/WASTE - PASSENGER WATER SYSTEM - WATER SERVICE PANEL
EFFECTIVITY
GUN ALL 38-11-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-11-00-008
WATER/WASTE - PASSENGER WATER SYSTEM - WATER SERVICE PANEL
WATER/WASTE - PASSENGER WATER SYSTEM - WATER SERVICE PANEL
EFFECTIVITY
GUN ALL 38-11-00
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