Hydraulics Flashcards
How many hydraulic systems are there?
3
(AOM 9-11-01)
What nominal pressure do all three hydraulic systems operate at?
3,000 psi
(AOM 9-11-01)
What MFD page provides a visual representation of the hydraulic system operation and parameters?
The HYDRAULIC synoptic page
(AOM 9-11-30)
What pressure is an amber tick mark placed at on the pressure indication for all three systems on the hydraulic synoptic page?
1,800 psi
(AOM 9-11-30)
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
(AOM 9-11-30)
Will a failure of two hydraulic systems result in a complete loss of flight-critical functions?
No, due to system design
(AOM 9-11-50)
What is hydraulic system 1 compromised of?
1 reservoir,
1 engine driven pump (EDP 1),
1 elec DC motor pump (DCMP 1),
1 shutoff valve (SOV 1)
1 accumulator
(AOM 9-11-50)
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
AOM 9-11-50
What is hydraulic system 2 compromised of?
One reservoir, one engine driven pump (EDP 2), one shutoff valve (SOV 2) and one accumulator
(AOM 9-11-50)
What is hydraulic system 3 compromised of?
One reservoir, one electrical DC motor pump DCMP 3) and one accumulator
(AOM 9-11-50
Hydraulic system 3 is designed to operate in conjunction with what electrical system(s)?
The battery and the Ram Air Turbine (RAT)
AOM 9-11-50
What is the only source of hydraulic power for hydraulic system 3?
The electric DCMP 3
(AOM 9-11-50)
What is the source of electrical power for the electric DCMP3 (hydraulic system 3)?
EMER BUS 3
(AOM 9-11-50)
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
(AOM 9-11-50)
What is the backup for hydraulic systems 1 and 2?
The PTU
(AOM 9-11-50)
What is the primary function of the PTU?
To transfer power from hydraulic system 1 to system 2 or vice versa
(AOM 9-11-50)
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
AOM 9-11-50
