Hydraulics Atlas Flashcards
How many hydraulic systems are there on the B767?
Three
How can you monitor the hydraulic pressure of a particular system?
EICAS status page
Which condition requires use of the reserve brakes and steering switch?
Loss of centre hydraulic system
The centre hydraulic system is powered by?
Two electric primary pumps
One air driven demand pump
The OVHT light above the left electric pump switch would indicate?
The left electric pump is overheated
The flaps and landing gear powered by which system?
Centre hydraulics
The fluid below the stand pipe in the centre reservoir is used by what system?
The reserve breaks and steering
The hydraulic driven generator is powered from which system?
Centre
What does the hydraulic system SYS PRESS light indicate?
Low hydraulic system pressure
What does the hydraulic system QTY light indicate?
Low hydraulic reservoir quantity
What is the normal position of the left and right engine hydraulic pump switches?
On at all times
How does pulling an engine fire switch affect the hydraulic system?
Closes the engine hydraulic pump shut off valve and depressurises the engine pump
Which of the following indicates the RAT is producing hydraulic pressure?
RAT pressure light illuminated
What is powered by the RAT?
Flight controls only
What position should the electric demand hydraulic pump selectors be in before the electrical power up procedure SP.6.1.is accomplished?
Off
What is the RAT status with the PRESS and UNLKD lights extinguished?
Locked, not providing hydraulic power
Which pumps are operating when the engine primary pumps are not operating?
Left and right electric demand pumps
When will the engine primary pump produce pressure?
When the engine rotates
What type of demand pump powers the left and right hydraulic systems?
Electrically driven
With the selector in AUTO, when will the left and right demand pumps operate?
When engine pump pressure is low
What is indicated with the UNLKD and the PRESS green light illuminated?
RAT is Extended and is providing hydraulic power
Which hydraulic system pump powers the reserve brake and steering system?
C1 pump
What does a hydraulic reservoir quantity indication of 0.95 mean? As displayed on the STATUS page?
95% of normal service level
Which reservoir contains the hydraulic fluid for reserve breaks and steering?
Centre
What is indicated by the VALVE amber light in the reserve breaks and steering switch?
Control valve/s disagree with switch position
The APU is providing electrical power prior to engine start. Why is the number two centre system electric pump low pressure light on?
Pump operation is inhibited to reduce electrical loads. Load shed
The extension of the wing flaps may interrupt the operation of the HDG true or false?
True
When are the flight control shut off switches used?
Ground use only by maintenance
