What type of demand pumps are in the LEFT &
RIGHT hydraulic systems?
Air driven
Electrically driven
Engine driven
What type of demand pump powers the CENTER
hydraulic system?
Electrically driven
Engine driven.
Air driven
Hydraulics powers the:a) Flaps / slatsb) Landing
gearc) Tailskidd) Nose wheel steeringe) Brakesf)
Flight controlsg) A/P servos
a, b, c, d, e, f
a, b, d, e, f
a, b, c, d, e, f
a, b, c, d
What action is required to turn off a demand
hydraulic pump ?
Pump output pressure high.
Push the pump switch
Rotate the selector to OFF
What is indicated when one hydraulic pump
'PRESS' light comes on?
System pressure low
Pump output pressure low
Pump output pressure high
With the selector in AUTO, when will the LEFT &
RIGHT demand pumps operate?
Only when operating one or both thrust levers.
Only when operating both thrust levers
During ground flaps operation
When engine pump pressure is low
What is indicated when a demand pump low
pressure light illuminates with the demand pump
selector in the AUTO position?
Pump operating but heavy hydraulic load items (such as flaps and/or landing gear) have been selected to
operate.
Pump signaled to operate, pump pressure is low
Pump not operating due to load shedding
Which of the following affect the operation of the air-
driven demand pump?
Braking
Landing gear retraction
Thust reverser actuation
The Ram Air Turbine (RAT) can be retracted in
flight.
True
False.
What does illumination of the QTY light indicate
about the quantity of fluid in the hydraulic reservoir?
Fifty-five percent reservoir quantity
Low reservoir quantity
Seventy-five percent reservoir quantity
Overfull resevoir quantity
Which hydraulic system pump powers the Reserve
Brakes & Steering?
Air driven pump.
Number one electric pump
Number two electric pump
Which reservoir contains the hydraulic fluid for
Reserve Brakes & Steering?
Right
Center
Left
Independent reservoirs fluid pressurized by bleed air
to ensure positive fluid flow.
True
False
How does pulling the Engine Fire switch affect the
hydraulic system?
Shuts off fluid to the engine pump & depressurizes the pump.
Depressurizes the associates hydraulic system
Disconnects the engine hydraulic pump, requiring maintenance reset
Which hydraulic systems flight controls are powered
by the ram Air Turbine?
Center
Right
Left
What is the lowest airspeed that the Ram Air
Turbine can provide adequate power for flight
control operation?
162 knots
80 knots
130 knots
142 knots.
Which of the following will shut off the flow of
hydraulic fluid to the LEFT engine pump?
Turn the LEFT engine pump off
Pull the LEFT engine fire switch
Pull the RIGHT engine fire switch
When does the Ram Air Turbine deploy
automatically?
Anytime CENTER system pressure is below normal.
Inflight when both engines fail
Anytime both engines are shutdown
Which one of the following indicates the Ram Air
Turbine is producing hydraulic power?
CENTER system low pressure light extinguished
RAT unlocked light illuminated.
RAT pressure light illuminated
Which of the following indicates a hydraulic pump
overheat?
An illuminated system temperature light
An illuminated pump overheat light.
A red pump temperature display on EICAS status page
What systems are supplied hydraulic pressure by
the Ram Air Turbine (RAT)?
Flight controls.
Flaps
Landing gear
Which condition requires use of the Reserve Brakes
& Steering switch?
Loss of RIGHT hydraulic system
Inoperative Ram Air Turbine
Loss of CENTER hydraulic system.
What is the effect on the CENTER hydraulic system
when the RAT is deployed?
All CENTER system componenets remain powered.
Only primary flight controls remain powered
Only elevator feel, yaw dampers and stab trim remain powered
What powers the RIGHT & LEFT hydraulic
systems?
Engine driven pump and a full time electric motor driven pump
Engine driven primary pump and demand electric motor driven pump
Full time engine driven pump and a full time electric motor driven pump
What system can be pressurized by the RAT pump?
Left & Right
Left
Right
Center
You have arrived at airplane for the first flight of the
day. Electrical power is connected. Engines not
started. In this situation, what would you do to
ensure adequate brake pressure?
Turn on the R ELEC pump switch
No action is necessary
Turn on the C ELEC pump switch
Turn on the L ELEC pump switch
In what position should the LEFT & RIGHT hydraulic
system demand pumps be set for normal flight
operations?
AUTO
AUTO or ON
OFF
ON
Which systems are backed up by the fluid below the
stand pipe in the CENTER hydraulic system?
Elevator trim, yaw damper and stab trim
Primary flight controls
All center system componenets
Reserve brakes & Steering
Center hydraulic system provide power (if both Main
AC buses are lost) to the Hydraulic Driven
Generator (HDG).
False.
True
N°2 electric pump is inhibited with:
Only 1 generator operating & Both CENTER electric pump switches ON
LEFT and RIGHT demand pumps operating
Only 1 generator operating, Both CENTER electric pump switches ON, LEFT and RIGHT demand pumps
operating
The Air pump is overheating.
C HYD DEM PUMP OVHT light illuminates, EICAS C HYD DEM OVHT advisory message appears,
corresponding reservoir temperature on EICAS increases abnormally (EICAS ELEC/HYD maintenance page).
C HYD DEM PUMP OVHT light illuminates, EICAS C HYD DEM OVHT advisory message appears
EICAS C HYD DEM OVHT advisory message appears, corresponding reservoir temperature on EICAS
increases abnormally (EICAS ELEC/HYD maintenance page).
Right RSVR light and R HYD QTY advisory EICAS
message appear. Given these indications, you
suspect a slow leak or low resevoir level. How can
this be confirmed?
Activate demand pump, observe Left SYS PRESS light.
Activate reserve brakes, observe BRAKE SOURCE light.
Select EICAS status page, observe Right system at .31RF
