Hydraulic Flashcards
What are they hydraulic systems on the B767
- Left, right and center
When does the RAT automatically deploy?
Dual engine failure above 80kts
What is the lowest airspeed that the RAT can provide adequate power?
130kts
What does the RAT power?
Flight control portion of center hydraulic system
How do you know the RAT is producing hydraulic pressure?
Green pressure light is illuminated
What is the RAT status with the PRESS and UNLKD lights extinguished?
Locked, not providing hydraulic power
When do the engine driven hydraulic pumps produce pressure?
When the engines begin to rotate
What type of demand pump powers the center hydraulic system?
Air driven pump
What type of demand pumps are on the left and right hydraulic system?
Electric driven demand pumps
What does the SYS PRESS light indicate?
Low hydraulic system pressure
When would you use the Reserve Brake and Steering Switch?
Loss of center hydraulic system
What powers the center hydraulic system?
Two electric electric pumps and one air driven pump
What is the normal position of the left and right hydraulic pump switches?
On at all times
What happens in the hydraulic system when an engine fire switch is pulled?
Closes the engine hydraulic pump shutoff valve and depressurizes the engine pump
What does the hydraulic system QTY light indicate?
Less than 50% reservoir quantity
“OVHT” light above the left electric pump switch indicates what?
Left electric pump is overheated
Which pumps are operating when the engine primary pumps are not operating?
Left and Right electric demand pumps
With the selector switch in AUTO, when will the left and right electric demand pumps operate?
When engine pump pressure is low and times of high demand
Which hydraulic system pump powers the reserve brake and steering system?
C1 pump
What does hydraulic reservoir quantity of .95 mean?
95% of service volume level
Which reservoir contains the hydraulic fluid for reserve brakes and steering?
Center
Why is the #2 center hydraulic pump low pressure light on prior to engine start?
Pump operation is inhibited to reduce electrical loads
What is significant about the flaps when the hydraulic driven generator is in use?
Flaps operate at half speed due to reduction in hydraulic fluid
