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EXT A (Momentary Action pb)
AVAIL Lt - Green if all external pwr parameters are normal.
- pressing when “AVAIL” ext pwr line contactor closes
- pressing when “ON” ext pwr line contactor opens
Overhead Panel Switches
10-Aug-10 For reference only 10
EXT B (Momentary Action pb)
AVAIL Lt - Green if all external pwr parameters are normal.
- if APU gen off, pressing when “AVAIL” ext pwr line contactor closes.
- pressing when “AUTO” ext pwr line contactor opens
Note 1: * APU has priority over EXT A & B for AC BUS 1.1 & 1.2 (AC BUS 1 A330)
* EXT A has priority over APU for AC BUS 2.3 & 2.4 (AC BUS 2 A330)
* APU has priority over EXT B for AC BUS 2.3 & 2.4 (AC BUS 2 A330)
* ENG gens have priority over EXT A & B or APU
* EXT B has priority over EXT A for AC BUS 1.1 & 1.2 (AC BUS 1 A330)
Note 2: When EXT B is AUTO, AUTO Lt remains illuminated even when APU has taken over.
EMER ELEC PWR PANEL
EMER GEN TEST
Pressed - Activates the emergency generator and connects gen to ESS
network.
- This test is inhibited when slats are extended.
- Deactivation only occurs on gnd when eng 1 & 4 (1& 2 A330)
shutdown with N2 <50% (A340 & A330).
- If pressed in flight LAND RECOVERY pb will need to be ON to recover
LAND RECOVERY AC and DC BUSES.
EMER GEN MAN ON
When Green HYD sys powered by eng driven pump the EMERG
GEN supplies:
- AC ESS BUS
- AC ESS SHED
- through ESS TR :
- DC ESS BUS
- DC ESS SHED
When Green HYD sys powered by RAT the EMERG GEN supplies:
- AC ESS BUS
- DC ESS BUS through the ESS TR.
If buses 1.1 & 2.4 (1 & 2 A330) are lost and eng 1& 4 (1 & 2 A330)are lost the RAT extends
automatically to power EMERG GEN.
AUTO - In flight EMEG GEN auto starts if normal AC is lost.
Pressed - EMERG GEN runs.
EMERG GEN FAULT Lt - Red when not supplying and normal AC is lost.
Overhead Panel Switches
10-Aug-10 For reference only 11
LAND
RECOVERY
A340
ON - In EMERG GEN config, AC LAND RECOVERY & DC LAND RECOVERY
buses are restored to power:
- LGCIU 1
- SFCC 1 (no flap if powered by RAT)
- ILS 1
A330
ON - In EMERG GEN config, AC LAND RECOVERY & DC LAND RECOVERY buses are
restored to power:
- LGCIU 1
- SFCC 1 (no flap if powered by RAT or batteries)
- ILS 1
- BSCU channel 1 (not recovered if powered by RAT or batteries)
- LH windshield anti ice (not recovered if powered by RAT or batteries)
- LH LANDING light (not recovered if powered by RAT or batteries)
- The following equipment is shed:
- HF 1, ADR 3 and consequently AP 1. (not avail if powered by RAT or batteries)
- Weather radar 1 (not avail if powered by RAT or batteries)
A340 & A330
Remaining fuel pump (if any) is lost. Pump may already be lost if below 260kt and emerg gen is
powered by the RAT.
26. FIRE
ENG 1(2,3,4) FIRE
When released out-
- aural warning cancelled
- squib armed
- fuel LP valve closed
- eng return valve closed
- hyd fire valve closed
- eng bleed valve close (adj eng also A340)
- pack flow control valve closed
- FADEC pwr supply cut
FIRE Lt – Red whenever fire detected
AGENT 1 AGENT 2
Both become active when ENG FIRE pb is released. Discharge
when pushed.
SQUIB Lt - when ENG FIRE pb released
DISCH Lt - Amber when bottle lost pressure
Overhead Panel Switches
10-Aug-10 For reference only 12
TEST
When pushed - continuous repetitive chime
- MASTER WARNING Lt flashes
- ECAM ENG FIRE activated
On fire panel - all ENG FIRE pb Red
- all SQUIB Lts white(provided charged)
- all DISCH Lts Amber
Fire lights come on, Eng pedestal fire lights also come on.
APU FIRE
When released out –
- APU shuts down
- aural warning cancelled
- squib armed
- LP fuel valve closes
- APU fuel pumps shut off (fwd & aft)
- APU bleed valve and X bleed valve close
- APU gen de-activated
FIRE Lt - Red whenever fire detected
AGENT
Becomes active when ENG FIRE pb is released.
Discharges when pushed.
SQUIB Lt - when ENG FIRE pb released
DISCH Lt - Amber when bottle lost pressure
Note: Red disc at rear of fuselage signals agent not discharged overboard due to bottle
overpressure.
TEST
As per Eng fire test.
VENTILATION
AVNCS
Detection by 2 smoke detectors (ionization type) in the air extraction duct of
avionics ventilation system. Each detector is linked to one of two detection loops.
SMOKE Lt - Red with ECAM when smoke detected in avionics ventilation duct.
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