Hydraulics Main Flashcards
What do the main hyd pumps provide hyd pressure to
flight controls, apu, rescue hoist
what does the utility hyd pump provide hyd px to
dome
hyd system components
3 identical hyd pumps, 2 transfer modules, one utility module, 3 dual stage primary servos, 2 tail rotor servos, pilot assist servo assembly, apu accumulator, and the rescue hoist
general pressure of the hyd system
3000 psi
what component of hyd system is at a lower px
pitch and roll trim actuators in the pilot assist servo assembly which are at 1000 psi
what kind of distribution system
dual isolation distribution system
when will we get a hyd warning
when the hyd system is severely degraded as a result of several compound malfunctions in #1/#2 and back up sys
what does the #1 pump power
1 pri servo and 1st stage of tail rotor servo
what are the components of the #1 hyd sys
1 hyd pump, #1 xfer module, 1st stage pri servo, 1st stage tail rotor servo
parts of the #1 hyd pump
px relief valve, bleed valve, px filter, return filter, automatic low level sensing switch
how many PDIs per pump
2
Of the 2 filters in the hydraulic pumps, which is bypassable
the return filter, the pressure filter will not be bypassed and allow bad fluid in
what causes the #1 RSVR low caution
closing of the auto low level sensing switch
purpose of the #1 transfer module
passes fluid from the #1 pump to the first stage pri servo and 1st stage tail servo, and in the event of loss of pressure of the #1 pump routes fluid from the back up pump
1 transfer module components
transfer/shutoff valve, pressure switch, first stage pri shutoff valve, first stage tail rotor shut off valve
What causes the #1 hyd pump caution
activation of the pressure switch in the #1 xfer module which also signals the LDI
what does the #2 hyd system power
second stage primary servos, pilot assist servo assembly