ATA 38 Water/Waste Flashcards
What is the purpose of the forward lavatory drain valve?
Drains water from the forward water supply line
Lav and galley sinks are drained by______________________.
Heated drain masts
How is water drained from the cabin door area sills?
Overboard through the drain fittings. (Only when aircraft is unpressurized).
How is the potable water system pressure provided?
Air compressor
How is the water system pressure regulated?
Pneumatic Pressure Regulator
What does each LAV have?
Water supply shutoff valve in cupboard under the sink
No hot water from a water heater, what would you check to determine cause?
Power indicator light? (If it’s off then the overheat switch may have tripped)
A water heater has overheated and tripped off, how do you reset it?
You open the door under the sink, remove the rubber cover and then manually reset the switch
When the water system is drained, the water heaters automatically shut off
TRUE or FALSE.
?
Describe the procedure to adjust potable water system indication.
Two adjustment screws on the water quantity transmitter.
What us the purpose of the Integrated system controller?
Flushes the toilet
How is a toilet assembly secured to the lavatory floor?
Quarter turn studs or two hitch pins
How long does the vacuum blower run during a flush cycle?
15 seconds
What is the purpose of point level sensors?
Monitors if waste tank is full or not
What is the purpose of the logic control module?
Disables power to the lav to stop the flush cycles when the waste tank is full.
