Hydraulic System Flashcards
What is on the left hydraulic system?
FLIP
F - Forward A/R Pumps
L - Landing Gear
I - Inboard Spoilers
P - Pilots Brakes
What’s on the right hydraulic system?
COL CAN BARF
C - Copilots Brakes
O- Outboard Spoilers
L - Leading edge Flaps
C- Copilot Instrument Power System
A - Aft A/R pumps
N - Nose wheel Steering
B - Boom Controls
A - APU start system
R - Powered Rudder
F - Main Flaps
Normal L/R hydraulic pressure
2400-3050psi
Normal Reserve Brake Pressure
1300-3050psi
Normal hydraulic quantity
4 - 4.5 gallons on each side
What should you expect upon landing gear retraction in regards to the hydraulic quantity?
The Left hydraulic system will show a loss of approximately 1 gallon
The left system cannot be fully pressurized by the AIC pumps unless what?
Inboard Spoiler switch is set to CUT-OFF
The right hydraulic system cannot be fully pressurized by the aux pump unless…
The CIPS is shutoff and the rudder power switch is OFF
What is the normal position for the AIC pump switches during flight?
Off because they draw fluid from the main systems return lines
When does the aux pump operate when set in the AUTO position?
Turns on between 2400 - 2700 psi
Turns off at 2900 +/- 150psi
Reserve brake max pressurization?
3525 +/- 250psi
Don’t set the parking brake if the reserve brake pressurization is ____ and above.
3100psi
The reserve brake pressurization goes directly to ____
The pilots brakes
What components can be crossed over from the right to the left system?
BARF
B - Boom Controls
A - APU start system
R - Rudder power
F - Main Flaps
What components can be crossed over from the left to the right system?
Landing Gear
What must you do prior to using the crossover valve?
Depressurize the system
One brake application is available to the pilots brakes when the reserve brake pressure reads ____
1300 psi
Preload pressures at 70*F
Left/ Right System = 2000psi
Reserve Brake = 1000psi
If you lose the right system, what should you do upon landing?
Nose wheel steering will be inoperative. The Dash 1 recommends taxiing clear of the runway.
When closed what does the depressurization valve do?
Blocks fluid, increases flow circulation, reduced available pressure to 750psi or less
When do the hydraulic pump inop lights illuminate?
May come on below 1100 +/- 250psi
Will come on below 700 psi
What is the limit for hydraulic pump isolation?
5 mins.
Excess of 5 mins could cause the pump to self destruct.
Rudder hydraulic pressure gage normal range.
High PX = 2800 - 3050psi
Low PX = 2100 - 2400 psi
Which set of A/R pumps are still available if the left system fails?
Aft A/R pumps
If right system fails, then forward A/R pumps are available
