Hydraulics Flashcards
There are 4 independent systems driven by
EDP (Engine driven pumps) & Demand pumps ()
Systems 1 and 4 have demand pumps.
ADP (Air Driven) ()
Systems 2 and 3 have demand pumps.
ACMP (AC electric) ()
The _____ Aux Pump works with System fluid.
4
The Aux pump is operated by a _____system.
electric ()
The Aux pump can be used both on the ground and in the air. True or False
False. Ground use only, for breaking and MX purposes ()
What hydraulic system powers the alternate brakes and the body gear steering system?
System 1 only (FCOM 13.20.2)
What hydraulic system powers the respective autopilot servos?
3 Left Autopilot, 1 Center Autopilot and 2 Right Autopilot (FCOM 13.20.2)
What causes the EICAS message “HYD PRESS DEM” to remain displayed after the selector has been placed in the ON position?
Pump pressure low.
<p>Select the correct statement:</p>
<p>Demand pumps 1 & 4 operate pneumatically. Electric power is required for EDP aux pump</p>
The electric AUX pump in system 4 …
Will produce normal breake pressure when on the ground
Demand selector 4 is in AUX. Select the correct statement…
The AUX pumps stops when EDP provides pressure
The EDPs can not deliver hydraulic pressure …
While engines are not running, and engine pump not switched ON, and eng fire switch pulled ()
<p>With flaps in landing position during approach ...</p>
<p>HYD 1 & 4 demand pumps activate ()</p>
Engine 3 is shut down due to a fire warning and the fire switch is pulled, and fuel control switch 3 in CUTOFF. Select the correct statement:
EDP depressurizes, and the respective demand pump operates, SOV 3 closed