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29. HYDRAULICS A340
A330
Overhead Panel Switches
10-Aug-10 For reference only 22
ENG 1 (2,3,4) PUMP
All systems have accumulators to maintain constant pressure. HP bleed air from
Eng 2 (Eng 1 A330) pressurize hydraulic reservoirs and if air press too low, uses
air from X-bleed duct.
ON - Pump pressurizes the system when eng is running @ 3000psi.
OFF - Pump is depressurized. Power generation stops.
FAULT Lt - Amber with ECAM if - reservoir low level
- reservoir overheats
- reservoir low air pressure
- pump low pressure
Extinguish when OFF sel. Except in overheat case (light stays on until overheat gone)
ELECTRIC HYD PUMPS
GREEN ELEC PUMP (or YELLOW)
AUTO - Pump is auto controlled by HSMU
- Green runs for 25sec if eng 1 or 4 (either A330) fails when gear lever
selected up and speed >100kts
- Green runs on gnd when eng 1 & 4 stopped & 2 & 3 running(A340 only)
- Yellow runs when eng 3 (eng 2 A330) fails and FLAPS lever not at zero &
>100kts. Remains until last eng shutdown.
- Yellow runs when a/c on gnd and cargo door manual selector in OPEN or
CLOSE. (no flap movement)
OFF - pump is de-energized
FAULT Lt - Amber with ECAM as per ENG 1 (2,3,4) plus pump overheat in which case the
pump shuts down
GREEN ELEC PUMP ON (or YELLOW) (Spring-loaded-guarded)
AUTO - pump controlled according to ELEC PUMP pb sw.
ON - pump energized provided ELEC PUMP not sel OFF.
- Will not start after elec power interruption
- Blue light when supplied
BLUE ELEC PUMP
STANDBY - pump controlled by BLUE ELEC PUMP ON pb
OFF - pump is off
FAULT Lt - Amber with ECAM as per ENG 1 (2,3,4) plus pump overheat in which
case the pump shuts down
Overhead Panel Switches
10-Aug-10 For reference only 23
BLUE ELEC PUMP ON (Spring-loaded-guarded)
ON - pump on provided ELEC PUMP pb is not sel OFF.
- If elec power supply removed, pump remain off when power is restored
STBY - pump is off
RAT MAN ON
Pressed - RAT extends
Auto extends when:
- AC NORM buses fail & Eng 1 & 4 fail (A340 only)
or - All engines fail
or - GREEN & BLUE LO LVL
or - GREEN & YELLOW LO LVL (A330 only)
LEAK MEASUREMENT VALVES
GBY
OFF - valve closes and HYD supply to primary flight controls is shut off.
- inhibited if speed above 100kts
- OFF light illuminates
Note: Yellow valve auto closed on ground when cargo door is operated
30. ICE & RAIN PROTECTION
ANTI ICE
WING
Hot air is supplied from pneumatic system and heats the four outboard slats
(4,5,6,7). If a leak is detected, valves auto close. Elec pwr supply failure, valves
close.
ON - Blue light with WING A.ICE indication on ECAM MEMO
- Wing a.ice control valves open if pneumatic supply avail.
- On gnd valves open for 30 sec only for test.
- N1 (EPR) limit Reduced
- Idle N1 (EPR) increased
OFF - valves close, ON light goes out
FAULT Lt - Amber with ECAM if
- position disagrees with selection
- low pressure detected
Overhead Panel Switches
10-Aug-10 For reference only 24
AUT
O
ENG 1 (2,3,4)
Hot air supplied by independent bleed from HP compressor thru open/close
valve. Elec pwr supply failure, valves open.
ON - Blue light with ENG A.ICE indication on ECAM MEMO
- valve opens
- (A330 only) if EIU inop, cont. ign is automatically activated
OFF - valves close, ON light goes out
FAULT Lt - Amber with ECAM if anti ice valve disagrees with ENG pb selection.
PROBE/
WINDOW
HEAT
AUTO - Heated automatically:
- in flight
- (A330) on gnd (except TAT probes) with one eng running
- (A340) on gnd (except TAT probes) with eng 2 or 3 running
- (Both) on gnd pitot heat at low level
ON Lt - Blue light indicates probes and windows are heated
WIPER
At OFF, wipers out of view
Max speed 230kts
RAIN RPLNT
One button per side.
Press once and timer applies measured amount
Inhibited when on gnd & engines stopped
33. LIGHTS
CTL
There are two 2-way switches to control the dome light.
- one located on rear panel near cockpit door
- one on overhead panel
Note: On gnd, all eng stopped (ie after rejected T/O and evac), right
dome light auto illuminates independently of selected posn of switches.
SLOW
FAST
OFF
Overhead Panel Switches
10-Aug-10 For reference only 25
ON
ARM
OFF
POS’N 1 & 2 - NAV & LOGO lights are ON when main gear struts are
compressed or the flaps are extended 15˚ or more.
Lights attached to nose gear strut go out when gear is retracted
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