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pressure is normal.
Cross line - Amber : The pushbutton switch for the designated PUMP is OFF.
“LO” - Amber : The pushbutton switch for the designated PUMP is on and hydraulic
pressure is low.
(11) System label
pressure > 1 450 PSI pressure < 1 450 PSI
YELLOW white amber
◂ green amber
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-29-20 P 10/10
FCOM 19 AUG 10
(12) System pressure
This legend, normally green, becomes amber when system pressure is below 1 450 PSI.
(13) PUMP
This legend, normally white, becomes amber when N2 is below idle.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
WARNINGS AND CAUTIONS
A318/A319/A320/A321 FLEET DSC-29-30 P 1/4
FCOM 19 AUG 10
WARNINGS AND CAUTIONS
Applicable to:
, ,
MSN,,
E/WD : FAILURE TITLE
conditions
AURAL
WARNING
MASTER
LIGHT
SD PAGE
CALLED
LOCAL
WARNING
FLT
PHASE
INHIB
B + Y
B + G SYS LO PR
Y + G
system pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI)
CRC MASTER
WARN FAULT lt 4, 5 (1)
G (Y)(B) RSVR LO AIR PR
reservoir air pressure ≤ 22 PSI
(reset if air pressure ≥ 25 PSI)
G (Y)(B) RSVR OVHT
fluid temperature ≥ 93 °C
(reset if temp ≤ 88 °C)
3, 4, 5, 7, 8
G (Y)(B) RSVR LO LVL
fluid quantity :
< 3.5 l (0.92 US Gal) (green-yellow)
< 2.4 l (0.63 US Gal) (blue)
FAULT lt on
associated
pump(s) pb
and on PTU
pb if Y or G
sys affected
G (Y) ENG 1(2) PUMP LO PR
pump outlet pressure ≤ 1 750 PSI
(reset if pressure ≥ 2 200 PSI)
Y ELEC PUMP LO PR
yellow system pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI) with
- Y ELEC PUMP pb at ON
- Y ENG PUMP and PTU not available
B ELEC PUMP LO PR
pump outlet pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI)
SINGLE
CHIME
MASTER
CAUT
HYD
FAULT lt
on affected
pump pb
4, 5, 7, 8
To be continued on next page
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
WARNINGS AND CAUTIONS
A318/A319/A320/A321 FLEET DSC-29-30 P 2/4
FCOM 19 AUG 10
Continued from previous page
E/WD : FAILURE TITLE
conditions
AURAL
WARNING
MASTER
LIGHT
SD PAGE
CALLED
LOCAL
WARNING
FLT
PHASE
INHIB
B ELEC PUMP OVHT
Y ELEC PUMP OVHT 3, 4, 5, 7, 8
G (Y) SYS LO PR
pump outlet pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI)
4, 5, 7, 8 (1)
B SYS LO PR
system pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI)
NIL 1, 4, 5,
7, 8, 10
PTU FAULT
PTU not running on ground in case differential
pressure higher than 650 PSI between G and
Y system, or in flight PTU still at AUTO position
in case of G or Y reservoir low level and G or Y
system low pressure.
FAULT lt only
in case of G
or Y RSVR
LO LVL or
RSVR LO
AIR PR or
RSVR OVHT
3, 4, 5,
8, 9, 10
RAT FAULT
RAT not fully stowed or pressure present
in RAT stowing actuator or RAT pump not available
SINGLE
CHIME
MASTER
CAUT HYD
NIL 3, 4, 5,
6, 7, 8, 9
(1) Inhibited on the ground (flight phases 1, 2, 9, 10) when corresponding engine is shut down.
MEMO DISPLAY
“RAT OUT” appears green, if the ram ‐ air turbine is not fully stowed.
The color changes to amber during flight phases 1 and 2.
‐ “HYD PTU” appears green, when the power transfer unit is running.
WARNINGS AND CAUTIONS
Applicable to: MSN,
4473
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
HYDRAULIC
WARNINGS AND CAUTIONS
A318/A319/A320/A321 FLEET DSC-29-30 P 3/4
FCOM 19 AUG 10
E/WD : FAILURE TITLE
conditions
AURAL
WARNING
MASTER
LIGHT
SD PAGE
CALLED
LOCAL
WARNING
FLT
PHASE
INHIB
B + Y
B + G SYS LO PR
Y + G
system pressure ≤ 1 450 PSI
(reset if pressure ≥ 1 750 PSI)
CRC MASTER
WARN FAULT lt 4, 5 (1)
G (Y) RSVR LO AIR PR
reservoir air pressure ≤ 22 PSI
(reset if air pressure ≥ 25 PSI)
3, 4, 5, 7, 8
B RSVR LO AIR PR
reservoir air pressure ≤ 30 PSI
(detected in flight but only displayed on ground after
　
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