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conditioning air is added to the ventilation air. Blower fan stops if BLOWER
in OVRD.
With both switches in OVRD, air is provided from the air-conditioning system
and is extracted overboard. The skin heat exchanger is not used. The extract
fan remains energized.
BLOWER FAULT - Smoke in the avionics vent duct, Blower Pressure Low or Duct
overheat. An external horn will sound if engines are not running.
EXTRACT FAULT - Smoke in the avionics duct, Extract Pressure Low.
An external horn will sound if engines are not running.
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17) CABIN FANS P/B
ON - The 2 cabin fans run
OFF - The 2 fans stop
18) ENG MAN START P/B
ON - The start valve opens if the mode select is in either the CRANK or
IGN/START position. Both pack valves close. When engine master switch is
set to ON, both A&B igniters fire, and the LP/HP fuel valves open.
OFF - The start valves are closed unless a start cycle is in progress.
19) N1 MODE P/B
ON - Thrust control reverts from EPR mode to rated N1 mode. Following an
automatic reversion to N1, rated or unrated mode, pressing the p/b confirms the
mode.
Note: If the EPR mode fails the FADEC degrades into either a rated N1 or
unrated N1 mode. Engine limit protections are available in rated N1 mode but
not in-unrated N1 mode. A/THR is lost; therefore Alpha floor is also lost.
OFF - If available, EPR mode is selected.
20) WIPER SWITCH
The rotary switch controls the on side wiper to the desired speed. There is a speed limit of
230 knots to prevent damage to the motor.
21) RAIN REPELLANT
When pressed provides a measured application of rain repellant to the windshield.
Most systems are deactivated.
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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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Pedestal
1) MCDU
The MCDU is the interface between the crew and FMGC. The FMGC is divided into two main parts:
· The Flight Management portion controls the following:
Navigation
Flight planning
Performance prediction and optimization
Navigation radio management
· The Flight Guidance portion controls the following:
Autopilot command
Flight director command
Autothrust command
2) SWITCHING
ATT HDG- NORM = ADIRU 1 supplies data to PFD 1, ND 1 and RMI/VOR DME
ADIRU 2 supplies data to PFD 2, ND 2
CAPT 3 = IR 3 Replaces IR 1
FO 3 = IR 3 Replaces IR 2
IR supplies HDG, ATT, and VS to PFD’s
AIR DATA- NORM = ADIRU 1 supplies data to PFD 1, ND 1 and RMI/VOR DME
ADIRU 2 supplies data to PFD 2, ND 2
CAPT 3 = ADR 3 Replaces ADR 1
FO 3 = ADR 3 Replaces ADR 2
ADR supplies AS, ALT and backup VS to PFD
EIS DMC- NORM = DMC 1 supplies data to PFD 1, ND 1 and Upper ECAM
DMC 2 supplies data to PFD 2, ND 2 and Lower ECAM
CAPT 3 = DMC replaces DMC 1
FO 3 = DMC 3 replaces DMC 2
ECAM ND- Allows transfer of SD to either the CAPT or FO ND.
3) RMP
2 RMP’s are installed on the Pedestal and 1 on the overhead panel. Each RMP can control any VHF
radio, #1 and #2 are connected directly to the transceivers, #3 is connected via #1or #2 only. The #1
RMP is available during Emergency Electric Configuration.
Chapter 5
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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4) ACP
The audio control panels provide the means to select each com/nav radio, interphone, and PA system.
#3 ACP should always have PA selected so the CVR can record the PA announcements.
5) WX RADAR
Two WX radar systems are installed. Only one transceiver may be used at a time. WX images may be
displayed in any mode except the Plan Mode.
6) ENGINE MASTER PANEL
ENGINE MASTER 1 & 2
ON- LP fuel valve will open.
During an automatic start, the HP valve will open provided the ENG MODE selector is in
IGN/START and N2 is between 10-16%.
During a manual start the MAN START P/B must be on and the ENG MODE selector
must be in IGN/START for the HP valve to open.
OFF- Closes both the LP and HP fuel valves. Resets both channels of the FADEC.
FIRE / FAULT LIGHT
FIRE - Aids the pilot in selecting the correct master switch to turn off in the event of a
fire.
FAULT- Illuminates for an automatic start abort.
A disagreement between the HP valve and the FADEC commanded position.
ENG MODE SELECTOR
CRANK- With the Manual Start P/B selected on, the start valve will open, if N2 is less
than 10%.
NORM- Continuous ignition both A&B igniters are automatically selected on when:
1.) Engine anti ice is selected on
2.) Take-off phase (TOGA/Flex power until 1500’)
3.) Approach Idle selected (Flaps/Slats extended)
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