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systems, all galley power will be lost automatically if a
generator bus loses power.
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EFFECTIVITY
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Functional Description
The galley power supply is controlled by the galley power
switch on the P5 forward overhead panel.
When the galley switch is in the ON position, relays R603 and
R604 energize. When the relays are energized, the galleys have
power.
Electrical load shedding happens if APU has high EGT, or
overcurrent condition is detected in the electrical supply system
from APU or engine generators. The overcurrent protection
logic deenergizes relays R603 and R604 and there is no power
supply to the galleys.
Training Information Point
See the electrical power chapter for more information on
electrical load shedding. (CHAPTER 24)
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General Description
The lavatories are modular, self contained units. Each lavatory
has this equipment:
* Air sickness bag and sanitary napkin dispenser
* Ashtray (interior and exterior)
* Assist handle
* Attendant call button and reset switch
* Coat hook
* Diaper changing table (some installations)
* Dual roll toilet paper holder
* Facial tissue dispenser
* Fire extinguisher (in waste compartment)
* Flushing toilet, with toilet seat and cover
* Non-glass mirror (shatter resistant)
* Handicap assist rails (some installations)
* Information and instruction placards (including NO
SMOKING sign)
* Light switches
* Oxygen masks (2)
* Paper cup dispenser
* Public address system loudspeaker
* Removable waste container
* RETURN TO SEAT sign
* Shaver outlet, 115v ac, 60 Hz (some installations)
* Smoke detector (in the ceiling)
* Soap dispenser (some installations)
* Toilet seat cover dispenser
* Wash basin with a stopper, faucet, and counter assembly
* Water heater.
A lock with a safety-release lever is in each lavatory door. When
a person in the lavatory locks the door, an OCCUPIED sign
appears on an indicator on the passenger compartment side of
the door. You may unlock this door from the passenger
compartment side of the door without the use of special tools.
The service unit provides lavatory ventilation. Air exhausts
through overboard vents in each lavatory.
The potable water system supplies water to the sink.
The lavatory floor is of watertight fiberglass construction to
prevent corrosion. A non-skid vinyl mat is bonded to the floor.
Location
The airline determines the number and location of the
lavatories. There are eight possible lavatory locations.
Training Information Point
Lavatory modules bolt to floor brackets and attach to overhead
structure with adjustable tie rods. When you install a lavatory,
adjust the length of the tie rod to fit without preload.
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