Hydraulics Flashcards
Where is system three serviced
A ground service panel located on the right side of the fuselage aft of the wing root
All three hydraulic systems operate at what pressure
3000 PSI
Systems one and two are located
In the aft equipment bay
Which hydraulic systems are powered by more than one hydraulic system
Rudder elevators and ailerons
Spoilers?
Ground spoilers
Multifuncion spoilers
Aileron
Hydraulic. 1&2 Fluid cooling?
Both systems share a ram air heat exchanger for fluid cooling
(1&2)
A fan assists on the ground
AC motor pump 1B pwrd by?
2B. ?
AC Pump 1B ……..AC BUS 2
AC pump 2B. ………AC BUS 1
When switch set to auto, pump will automatically start when..
Flaps are out of the 0° position
AC BUS 2 must b pwrd for 1B op
AC BUS 1 “. “. “. 2B
Do AC motor pumps 1B and 2B automatically start during or after an engine failure
No
HYDR SOV 1 or 2 OPEN caution?
Respective shutoff valve is open with an associated engine fire
Hydraulic system shut off valves are on what bus
DC emergency bus
Does hydraulic system number three have a heat exchanger
No
Hydraulic fluid lines run through the fuel tanks thereby allowing cooling
AC 3B fuel pump operates when?
During takeoff and landing
Independent of the 3-B switch setting
AC 3 A. Runs continuously to maintain normal system pressure?
Yes
AC 3B Will operates irrespective of switch position when
ADG is deployed
Hydraulic shut off valve position indicator shows half magenta
Failed
When are the AC pumps auto run?
Flaps out of 0°
Switch in auto
AC bus 1 and 2 powered
Do the hydraulic pumps operate in auto when flaps which is selected to 1°?
No
Because no flaps are xtended only 20° slats
Ram air scoop .. 3 things?
Cools hydraulic systems 1and 2
Pack cooling
Ram air
Which hydraulic system is the largest
3
What is the purpose of the accumulators
To dampen pressure surges
And maintain system pressure
Lose systems 1&2c
Main will free fall
Nose needs hydraulics to release uplocks
Are the accumulators showing on the synoptic page?
No
What do the accumulators do?
Store fluid under pressure
Dampens pressure surges
What two ways can we close the hydraulic shut off valves
Engine fire push switch
Hydraulic SOV switch light
Which hydraulic pump runs continuously
3A
When in auto when will be B pumps operate?
Respective bus powered
Flaps greater than zero
Any generator operating
Thomas will not come on automatically if a loss of hydraulic pressure
What does interlock a law regarding to B pumps?
Allows the B pumps to be turned on with no generator operating… on ground
(A C external power only)
B Pumps will operate when in the “ON” position when?
Respective bus is powered
Any generator operating
*unless operating under the interlock feature,then no generator needs to be operating
When does the hydraulic 3B pump operate regardless of switch position?
When the ADG is deployed
Are the accumulators shown on the synoptic page?
No
What are the accumulators do?
Store fluid under pressure
Dampens pressure surges
What two ways can we close the hydraulic shut off valves
Engine fire push switch
Hydraulic SOV switch light
Which hydraulic pump runs continuously
3A
When in auto when will be B pumps operate?
Respective bus powered
Flaps greater than zero
Any generator operating
Thomas will not come on automatically if a loss of hydraulic pressure
What does interlock a law regarding to B pumps?
Allows the B pumps to be turned on with no generator operating
(A C external power only)
B Pumps will operate when in the on position when?
Respective bus is powered
Any generator operating
*unless operating under the interlock feature,then no generator needs to be operating
When does the hydraulic 3B pump operate regardless of switch position?
When the ADG is deployed
Where do I find the hydraulic fluid level chart
In the ODH
The hydraulic shut off valves are operated ?
Electrically 11-10
Electrically operated hydraulic SOVs
Which pumps are engine driven?
1A 2A
If we lose hydraulics two and three?
Manuel freefall
Nose will not drop needs hydraulics
Which flight controls do all three hydraulic systems power?
Rudder and elevators ailerons
Where do I find the hydraulic fluid levels chart?
In the ODH 15-1
Hydraulic pump 3B will operate Regardless of switch position!! 
When the ADG is deployed
When will the AC hydraulic motor pumps operate in the auto mode
Flaps greater than 0
Cross side bus powered
Any generator operating
If cation msg ….
“AC2 AUTOXFER” appears…
What hydraulics are affected?
Hydraulics 3 A .. Is off of AC BUS 2
Hydraulic fluid quantity in the white?
45 to 85
Hydraulic Amber?
Hi temp greater than 96°
What type of pumps are hydraulic pumps 3a/3b?
Acmp pumps.. system three has no engine driven pumps
