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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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WATER/WASTE - VACUUM WASTE SYSTEM - FLUSH SWITCH
WATER/WASTE - VACUUM WASTE SYSTEM - FLUSH SWITCH
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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WATER/WASTE - VACUUM WASTE SYSTEM - FLUSH SWITCH
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The toilet assembly collects human waste material. The toilet
assembly operates the vacuum waste system to send the waste
to the waste tank.
Location
There is a toilet assembly in each lavatory.
Physical Description
The toilet assembly has these parts:
* Toilet bowl
* Rinse ring
* Pedestal
* Rinse valve
* Anti-siphon valve
* Flush valve
* Manual shutoff valve
* Manual shutoff handle
* Flush control unit (FCU).
The toilet bowl and the pedestal are stainless steel. The internal
surface of the toilet bowl has a layer of non-stick material on it to
keep the toilet bowl clean of toilet waste.
The rinse ring is a stainless steel tube. The rinse ring attaches
to the inside, upper rim of the toilet bowl and connects to the
rinse valve through the anti-siphon valve.
The rinse valve gives water for toilet flush. The rinse valve is a
flow through, solenoid operated, poppet valve with an internal
filter. The rinse valve opens and self drains when the potable
water system is not pressurized.
The anti-siphon valve prevents backflow of water from the toilet
bowl into the potable water system.
The flush valve keeps the flow path between the toilet bowl and
the waste line closed. The valve opens to let waste material
move from the toilet bowl to the waste lines and to the waste
tank. The flush valve is an electrically actuated, reversible,
rotating disk valve. The motor has built-in thermal overload
protection.
The manual shutoff handle closes the manual shutoff valve.
Functional Description
The flush cycle starts when a flush signal is received from the
flush switch. Each flush cycle has the following steps:
* Rinse valve opens to rinse the toilet bowl
* Rinse valve closes
* Flush valve opens to drain the toilet contents.
* Flush valve closes.
When the rinse valve is open, eight ounces of water flushes the
toilet bowl.
WATER/WASTE - VACUUM WASTE SYSTEM - TOILET ASSEMBLY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-005
Training Information Point
If the flush valve fails in the open position, cabin pressure goes
through the open valve. You can use the manual shutoff handle
to close the manual shutoff valve. Pull the manual shutoff
handle to close the manual shutoff valve. Push the manual
shutoff handle to open the manual shutoff valve.
The FCU has a maintenance switch. Use the maintenance
switch to keep the flush valve open during maintenance
operations. Push the maintenance switch one time to open
the flush valve. Push the maintenance switch again and hold it
in for two seconds to operate the vacuum blower. The vacuum
blower operates for ten seconds and then stops. Push the toilet
flush switch to close the flush valve and return the toilet to
normal operation.
The toilet bowl has a layer of non-stick material. Do not let toilet
bowl cleaner fluid stay in the toilet bowl for a long period of
time. The toilet bowl cleaner fluid can damage the surface of the
toilet bowl.
WATER/WASTE - VACUUM WASTE SYSTEM - TOILET ASSEMBLY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
38-32-00-005
WATER/WASTE - VACUUM WASTE SYSTEM - TOILET ASSEMBLY
WATER/WASTE - VACUUM WASTE SYSTEM - TOILET ASSEMBLY
EFFECTIVITY
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D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
　
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