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When a leak is detected, the Wing Anti-ice valves close automatically.
Wing Anti-ice performance bleed penalty should be applied if Wing Anti-ice
will be used from T/O to 1500’ AFE
Note: Wing Anti-ice valves are fail safe closed
10) ENG ANTI-ICE P/B
ON - Valve opens if engine is running. Continuous ignition is turned on.
OFF - Valve is closed
FAULT - Valve / Switch disagreement
Note: Engine anti-ice valves are fail safe open
11) PROBE/WINDOW HEAT P/B
AUTO - Probes and windows are heated in-flight. On the ground, low heat is applied if
one or more engines are running. Windows will go from Low to High when
T/O power is set. TAT probes are not heated on the ground.
ON - Probes and windows are heated
12) DITCHING P/B
NORMAL - Normal system operation
ON - Closes the following:
· Outflow valve (in auto only)
· RAM air inlet
· Avionics vent inlet & extract valves
· Pack control valves
13) LANDING ELEV
AUTO - FMGS data is used for pressurization.
MANUAL - Landing elevation can be selected between –2000 to 14,000 ft
Note: In auto or manual the landing elevation will be displayed on ECAM.
A I R B U S A 3 2 0 / 3 1 9 S T U D Y G U I D E
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14) MODE SEL P/B
AUTO - The outflow valve is controlled by one system at a time. There are two
independent controller/systems. Max cabin pressure differential is 8.6 psid,
safety relief 8.9 psid. Cabin warning at 9550 ± 350 ft.
The system will automatically change CPC’s:
· Due to failure of the active system
· 70 seconds after each landing
· Selecting MAN for at least 10 seconds then back to AUTO
MAN - The MAN V/S CTL switch controls the position of the outflow valve using
the backup portion of the #1 CPC
FAULT - Failure of both automatic systems
15) MAN V/S CONTROL SW
UP - Opens the outflow valve. (Mode select in MAN)
DN - Closes the outflow valve. (Mode select in MAN)
16) APU MASTER SW
ON - Power supplied to the APU system; air intake flap opens; fuel isolation valve
opens; the AC powered APU fuel pump will operate (if fuel is not supplied
via aircraft fuel pumps) the APU page on ECAM appears (not during battery
start). APU fuel pump is powered through the static inverter during a battery
start.
OFF - ON and AVAIL lights extinguish, RPM goes to 75% for a 60-120 second
cool down period, at 7% rpm the inlet flap closes.
FAULT - Automatic shutdown for:
· Fire (ground only)
· ECB sensor fault
· Start/running malfunction
Note: In-flight max operating altitude is 39,000 ft. Bleed air is available up to
20,000 ft. Full electrical power is available up to 25,000 ft. at that point the
generator load capacity begins to drop. (Electrical output has priority over
bleed air). The APU may be started up to 39,000 ft. An in-flight battery start
is limited to 25,000 ft.
A320: During Emergency electrical configuration, the APU may start,
however, there may not be sufficient power to close the GLC. Therefore, it is
not recommended to attempt an APU start as it essentially wastes 5 minutes
of the estimated 30 available minutes of battery power.
A319: During Emergency electrical configuration, the RAT will operate
until touchdown starting the APU is recommended
A I R B U S A 3 2 0 / 3 1 9 S T U D Y G U I D E
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17) APU START P/B
ON - The APU ECB sequences APU start:
· Starter engaged
· 7% ignition is supplied
· 50% starter cuts out, ignition off
· 95% Avail light comes on APU is available for electric and pneumatic
loads.
AVAIL - The on light extinguishes. The APU can now supply bleed and electrical
power
Note: Max start EGT - 1038°c, three consecutive starts may be attempted
with a 1 minute cooling period between attempts. After the third attempt, a
60-minute cool down is required.
18) SEAT BELT SW
ON - Seat Belt signs illuminate
OFF - Signs extinguish
19) NO SMOKING SW
ON - No Smoking and Exit signs illuminate
AUTO - No Smoking and Exit signs illuminate with gear down
OFF - No Smoking and Exit signs extinguish. Exit signs control system is reset.
Note: The No Smoking, Fasten Seat Belt, and Exit signs illuminate
automatically with an excessive cabin altitude 11300 ft +0/-350 ft regardless
of switch position.
18) EMERG EXIT OFF
OFF - Emergency Exit lights are not armed
19) EMERG EXIT LT SW
ON - Emergency lights, Exit signs and floor path lights illuminate
ARM - Emergency lights and Exit signs illuminate if AC Bus 1 fails.
Floor path markings illuminate if the DC ESS SHED bus fails.
　
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