ATA 38

Where does the toilet bowl rinsing water come from?

• Waste water tank.

• Potable water tank.

• Waste water system.

Why are drain valves installed in the waste water drain system?

• To allow the sinks and wash basins to be isolated.

• To prevent a permanent loss of cabin air pressurization.

• To prevent ice formation.

Where can the potable water quantity be checked?

• On the indicator on the water service panel only.

• On the FAP.

• On the indicator on the water service panel and on the FAP.

How many valves are used during draining operation of A320 aircraft water tank

• Two

• Three

• Four

How is the waste transported to the waste holding tank?

• By the vacuum created in the waste tank.

• By the water flushing and gravity.

• By the vacuum created in the toilet bowl

How are the wash basin water heaters protected from damage should the normal temperature control fail?

• There is no protection

• An over temperature safety device cuts off the electrical power

• By a warning on the ECAM display

From where does the LAV INOP Fault light come at the FWD Attendant Panel?

• A level sensor in each toilet unit

• A fault of the related lavatory flush control unit (FCU)

• The door limit switch (panel door open) on the servicing panel.

Is it possible to drain the whole water system without electrical power?

• No, electrical power is always required.

• Yes, all the drain valves can be operated manually.

• No, only the water tank can be drained by using the fill/overflow drain valve.

Why are the drain valve installed in the waste water drain system?

• To allow the sink and wash basin to be isolated

• To prevent a permanent loss of cabin air pressurization

• To prevent wash basin from being isolated

Can any toilet be used during servicing?

• Yes, because toilet use and servicing is independent

• Yes, but only the front toilet

• No, the door limit switch on the toilet servicing panel deactivates the toilet control system.