Systems HYDRAULICS Flashcards
Where can you find which HYD systems are being powered
HYD Synoptic page
FCOM 1 12-01-4
What is the function of the Priority Valves PV
Maintain system pressure and flow capability for high priority users if there is a pressure drop below 1700 psi
FCOM 1 12-02-13
System 1 Priority Valve PV isolates
The LDG gear control valve to maintain pressure for flight controls and L thrust reverser
FCOM 1 12-02-13
System 2 Priority Valve PV isolates
The PTU to maintain pressure for the flight controls and R thrust reverser
FCOM 1 12-02-14
System 3 Priority Valve isolates
The flap and slat Power Drive Units PDU’s to maintain pressure for the flight controls
FCOM 1 12-03-8
In AUTO, the PTU will start when
There is no overtemperature condition >107 deg, system No 2 is pressurised and System No 1 has > 5%, the PTU will operate automatically when either
T/O thrust is applied
In flight slats/flaps 4/5
ALT/FLAP selected
EDP 1A fail
Left Eng fail
Single engine taxi (R ENG only) Park Brake set to off
FCOM 1 12-04-2
How long does the Alternating Current Motor Pump ACMP2B run if Park Brake is cycled OFF-ON -OFF
6 Minutes
FCOM 1 12-04-3
What are the sources of pressure for HYD SYS 3
2 Accumulators, ACMP 3A, ACMP 3B, RAT (total AC power loss)
FCOM 1 12-03-2
How is the hydraulic fluid of Sys 1 & 2 cooled
Heat exchangers in each fuel tank
FCOM 1 12-02-10
At what temperature does the Hydraulic Shut Off Valve automatically close
125 deg
FCOM 1 12-02-12
The two accumulators in HYD SYS 3 function is to
Maintain pressure during RAT deployment and to dampen pressure transience during rapid movement of components
With no overtemp condition, AC power available, quantity more than 5%, either engine operating and airborne, at less than what pressure will HYD ACMP 3A operate automatically
3350 psi
FCOM 1 12-04-5
