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electrical power, only one pump at a time is allowed to run with 3A, 3B, 2B and 1B in priority.
In flight with the APU as the single source of electrical power, two pumps (only 3A and 3B) are
allowed to run to prevent overloading of the generator.
HYDRAULICS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
13−10−20
RESERVOIR QUANTITY LIMITS
The table below describes the range of values between the upper and lower fluid quantity limits for
each system. The green brackets [ are variable in size and in combination with the filling and digital
readout represent the level of quantity in the reservoir for all airplane configurations.
NOTE
In some cases, a reservoir quantity can be amber, but the HYD 1−2−3
LO QTY EICAS caution message will be inhibited.
The quantity indication (reservoir filling and digital readout) for systems 1 and 2 will turn amber if the
displayed reservoir quantity for that system is at or below the lower limit.
SYSTEM #1 SYSTEM #3 SYSTEM #2
LOWER
LIMIT
UPPER
LIMIT
ON GROUND:
Hydraulic Quantity
Lower Limit = 34%
IN FLIGHT:
Hydraulic Quantity
Lower Limit = 16%
ON GROUND:
Hydraulic Quantity
Lower Limit = 32%
IN FLIGHT:
Hydraulic Quantity
Lower Limit = 12%
ON GROUND:
Hydraulic Quantity
Lower Limit = 20%
IN FLIGHT:
Hydraulic Quantity Lower
Limit (L & R gear
uplocked)= 28%
100% 100%
ON GROUND:
Hydraulic Quantity
Upper Limit = 70%
IN FLIGHT:
Hydraulic Quantity Upper
Limit = 100%
GF1310_022
70°C
62 %
68°C
62 %
70°C
62 %
Each hydraulic system quantity indication will read accurate only when the system is pressurized.
The quantity indication for system 3 will turn amber when the displayed quantity is at or below the
lower limit or at or above the upper limit when the quantity reaches 70%.
HYDRAULICS
Rev 3, Apr 25, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
13−10−21
HYDRAULIC SYSTEM DISTRIBUTION SCHEMATIC
THRUST REV
PARKING BRAKE
NLG
MF SPOILER 4
RUDDER
MLG
LH
THRUST REV
RH
LH OUTBD
MF SPOILER 3
LH INBD
MF SPOILER 3
LH INBD
MF SPOILER 4
RH OUTBD
MF SPOILER 2
LH OUTBD
MF SPOILER 1
LH INBD
GRND SP
LH OUTBD
GRND SP
RH OUTBD
MF SPOILER 1
RH INBD
MF SPOILER 2
RH OUTBD
GRND SP
LH INBD
GRND SP
RH INBD
LH MLG
UPLOCK
LH MLG
ACTUATORS DOORS
RH MLG
ACTUATORS
RH MLG
UPLOCK
UPLOCK
NLG
ACTUATOR
NLG
DOORS
NLG
DOWNLOCK
NLG
STEERING
BRAKE LH OUTBD
BRAKE
LH INBD
BRAKE
RH INBD
BRAKE
RH OUTBD
LH
AILERON
RH
AILERON
LH
ELEVATOR
RH
ELEVATOR
HYDRAULIC
SYSTEM
NO.3
HYDRAULIC
SYSTEM
NO.2
HYDRAULIC
SYSTEM
NO.1
GF1310_023
HYDRAULICS
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
13−10−22
HYDRAULIC SYNOPTIC PAGE
Hydraulic Pumps 1A,
2A, 1B, 2B, 3A, 3B and
RAT
Displays the condition of
each of the hydraulic
pumps.
Green − >1800 psi.
Amber − Hydraulic
supply to system
inoperative < 1800 psi.
White − Hydraulic
pump is not commanded
to operate.
Hydraulic RAT Pump
Displays RAT pump
deployed and powering
system #3. The pump
symbol and flow lines
only appear when the
RAT is deployed.
GF1310_024
70°C 68°C 70°C
HYDRAULIC
1B 3A 3B 2B
INBD
BRAKES
2900
PSI
OUTBD
BRAKES
NORM
PSI PSI PSI
2950 3000 2950
RUD
ELEV R
AIL R
FLT SPLRS
GEAR
REVERSER R
RUD
L ELEV R
L AIL R
GND SPLRS
GEAR
NOSE STEER
RUD
L ELEV
L AIL
FLT SPLRS
GND SPLRS
L REVERSER
PARK/EMER BRAKE
1A 2A
62 % 64 % 62 %
64 %
3A RAT 3B
PSI
3000
HYDRAULIC
SYSTEM #3
HYDRAULICS
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
13−10−23
HYDRAULIC SYNOPTIC PAGE (CONT'D)
Engine Driven Pump
Input Line
Green − SOV open.
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