Hydraulics Flashcards
Hydraulic Fluid temperature is maintained by … ?
Fuel to hydraulic fluid heat exchanger in the wing fuel tank
Typical hydraulic system pressure is … ?
3000 psi
The Lower Rudder PCU is supplied hydraulic pressure from … ?
Right Hydraulic System or Aux DCMP
The Upper Rudder PCU is supplied hydraulic pressure from … ?
Left Hydraulic System
The Landing Gear is supplied hydraulic pressure from … ?
Left Hydraulic System
The Power Transfer Unit (PTU) is supplied hydraulic pressure from … ?
Right Hydraulic System
Fluid Volume of the Left Hydraulic Reservoir is roughly … ?
13 quarts
Fluid Volume of the Right Hydraulic Reservoir is roughly … ?
9.1 quarts
With the switch in the AUTO position, the DCMP will be on when … ?
Flaps are set to 10 degrees or greater. The pumps also activate when low system pressure is detected.
Hydraulic shutoff valves are situated in what line of the engine driven pump?
Suction Line outside of the pylon area
Automatic closing of a hydraulic shutoff valve occurs when? (No pilot input)
Hydraulic system fluid temperature reaches 135 C
Manual closure of a hydraulic shutoff valve can occur when?
Pressing the L/R SOV button on the hydraulic panel or pressing the L/R ENG FIRE pushbutton
At hydraulic fluid temperatures above ___ ,
the bypass valve is in the fully open position.
52 C
Hydraulic fluid temperatures below ____ ,
route fluid around the heat exchanger.
35 C
The Aux Pump comes on at what pressure and shuts off at what pressure?
Comes on at 2500
Shuts off at 3350
The auxiliary switching valve is activated, or shuttles, when … ?
Loss of right side hydraulic pressure.
In the auto position, the PTU will be activated when? (4)
Landing-gear lever selected UP
Landing gear has not fully retracted
Hydraulic pressure from Left EDP is low
Hydraulic pressure from Right EDP is
normal
What electrically powers the Left DCMP?
The right main bus
What electrically powers the Right DCMP?
The left essential bus
With no generators operational, the Right DCMP automatically starts when … ?
Flaps are moved from a non-zero position
What DCMP takes priority with the loss of both EDP’s?
Right DCMP
The Auxiliary DCMP receives electrical power from … ?
The left essential bus
