Hydraulics Flashcards
(16 cards)
How many hydraulic systems are there?
3
What nominal pressure do all three hydraulic systems operate at?
3000 psi
What pressure is an amber tick mark placed at on the pressure indication for all three systems on the hydraulic synoptic page?
1800 psi
What color is the symbol for shutoff valves
that are open, engine driven pumps that are on and hydraulic flow lines that are pressurized?
Green
Will a failure of two hydraulic systems result in a complete loss of flight-critical functions?
no
What is Hydraulic System 1 compromised of?
One reservoir, one engine driven pump (EDP 1), one electrical DC motor pump (DCMP 1), one shutoff valve (SOV 1) and one accumulator
When will the DCMP 1 be automatically commanded on with the HYD 1 ELEC PUMP knob in the AUTO position?
During takeoff and landing phases
What is Hydraulic System 2 compromised of?
One reservoir, one engine driven pump (EDP 2), one shutoff valve (SOV 2) and one accumulator
What is Hydraulic System 3 compromised of?
One reservoir, one electrical DC motor pump (DCMP 3) and one accumulator
What is the only source of hydraulic power for Hydraulic System 3?
The battery and the Ram Air Turbine (RAT)
What is the only source of hydraulic power for Hydraulic System 3?
The electric DCMP 3
What is the source of electrical power for the electric DCMP3 (Hydraulic System 3)?
EMER BUS 3
If the airplane loses HYD 1 and HYD 2, will
the overheat protection system of HYD 3 still be functional?
No, it will be inhibited
What is the backup for Hydraulic Systems 1 and 2?
the PTU
What is the primary function of the PTU?
To transfer power from Hydraulic System 1 to System 2 or vice versa
When the PTU knob is in the AUTO position, when will the LGHCUs automatically activate the PTU?
In the event of an engine failure or EDP failure
