Hydraulic Power (29) Flashcards
What does the Hyd system supply?
No1 - 3xMRA, 1xTRA, TRSOV
No2 - 3xMRA, 1xTRA
How long are the hydraulic components stated to last during an upper deck fire in order to perform a safe landing?
5 mins
How are HPS1 & 2 powered?
Via the Accessory Gearbox of the MRGB
When does the TRSOV activate?
At 55% on PCM1
How much oil can each PCM carry?
1.3L
What markings and at what percentages are on the PCMs?
REF - 75% (refill)
ALERT - 55%
MIN - 40%
Is there a Hyd Filter CAS message?
NO
How is 270bar (3000bar) regulated in the HPS?
Using the axial piston pumps with built-in compensator valves
Where are the SOVs fitted within the Hydraulic system?
Within the HPS
Hyd fluid operating pressure and temp?
3000psi (207bar)
-40 to +135°C
How is the Hyd T&P shown on the PFD and MFD
PFD - numbers
MFD - bar and numbers
How many pumps does the Hyd system have?
2
At what level does the TRSOV close and on which Hyd system?
55% Hyd 1
At what level is [HYD MIN] annunciate?
40%
When will you get [1(2) HYD OIL PRESS]?
<163bar
When will you get [1(2) HYD OIL TEMP]?
> 135°C
What does [1(2) HYD SERVO] signify?
Loss of at least one servo on that side
Does the aircraft specify failure of a hyd pump?
No
Hyd synoptic will show the pump as white - off condition)
How do you know when a Hyd has to be refilled?
Hyd synoptic page willl show at 75%
or by checking the reservoir
What happens at 55% on Hyd 1?
TRSOV will close automatically by the AMMC
What happens if SOV2 has been closed following a failure and there is a subsequent leak in HYD 1?
The AMMC keeps the TRSOV open so that they TRA recieves hydraulic power
When is the [1(2) HYD MIN] caution posted?
At 40%
When is TRSOV activated?
55%
When does the HYD Temp indicate White on Red background>?
> 135°C
What is the minimum hydraulic temperature for starting the engines?
-40°C
