11.17 Flashcards
What are the parts of portable water system
Tanks and distro lines
What type of water is portable
Drinkable
How is portable water transported
With pressurisation from the water pressurisation system
When is a electric air compressor used
When pneumatic air isn’t available
What does a check valve do
Prevents reverse flow
Where is the relief valve located
Between pressure switch and water tanks
What does a shut off valve do
Allow you to isolate the system for maintenance
Where are manual shut off valves located
In Each lavatory
What are the 3 reasons to complety drain the water system
- Before disinfecting
- If parking in freezing weather
- Every 3 days to add fresh water to prevent bacteria growth
Where is the water service panel
Lower part of fuselage there’s a recess and access door
What is a fill overflow valve
Four part machined body with rotating core
What does the spring loaded core do
Allow positive searing and prevents leakage
How is water quantity detected
Signals from quantity transmitter and preselected valve from the the attendants panel
How is water drained from the system
Drain valves and shut off valves
How are drain valves operated
Manually
What drains water out
Pneumatic bleed air then gravity
What does a header do
Distributes water
What is a wash basin
Faucet
What is a mixer valve
Mix cold and warm water
How does a infrared sensor work
Reflective sensor with 2 lenses
What does a sensor unit do in infrared faucet
Opens solenoid operated shut off valve on the mixer valve
How much water does the water heater hold
1.5L
Where is wastewater held and drained
Held in holding tank and drained via mast
What an addition use of grey water
Assist with flushing
How is the flow of wastewater generated
By gravity
In flight by differential pressure between pressurised cabin and exhaust end of drain mast
What in the flush motor activates timer
Flush handle
What does the nozzle do and how long is flush time
Directs spray in swirling motion
8-12s
What pump does the flush motor consist of and how is it powered
Impeller pump to rotate
Three phase electric motor
How does a vaccum toilet work
Suctions waste into holding tanks
Where is vaccum system serviced
From central waste panel
How many times can you use the toilet before its drained
100 times
Where is the drain valve on flush motor
Bottom of water tank
How much is a flush motor toilet charged with when serviced
13-31L of recommend chemical solution
Where is the waste service panel
Lower part of fuselage
What precaution when using CPF
Use in Well ventilated areas and use mask
What should we be careful of when looking at bilge areas on the underside of fuselage
Any liquid needs immediate investigation
