skyblue CBT flight controls Flashcards
how are the rudder, elevator and ailerons actuated?
mechanically
how are the spoilers actuated?
through the blue hydraulic system
what ctuates the outboard and inboard flaps?
blue hydraulic system
how does the gust lock prevent damage?
- mechanically locks elevators and ailerons
- the ruddere is also dampened
what does the srping tab on the aileron do?
moves in the opposite direction of movement of the aileron to assist aerodynamically
how is spoiler operation controlled?
mechanically
what will full scale control wheel deflection (87 degrees) translate to in the ailerons?
14 degrees up or down
the ailerons and spoilers are controlled by an string and drum assembly on which wheel?
F/O control wheels
how does the autopilot control ailerons and spoilers?
through an autopilot control actuator which is connected to the second drum under the FO wheel
what powers aileron trim switches?
DC EMER BUS
what is the max deflection of the left aileron trim tab?
6.7 degrees up or down
how long does full aileron trim travel take?
30 seconds
what does an amber aileron symbol on the EWD mean?
roll mistrim condition
what does the spoiler valve block do?
opens to provide hydraulic pressure which actuates the spoiler when required
how is pitch control achived?
through the control column
how do we activate the pitch uncoupling mechanism>
both crew members apply force to the desired flight condition. this uncouples the elevators
what will we get if we uncouple the elevator?
pitch disconnect warning
what is full control column deflection>
6.75 degrees down
11.25 degrees up
what is full elevator deflection?
23 degrees nose up
13 degrees nose down
how much will the automatic pitch trim tab move?
approx 50% of the elevators movement
how is pitch trim achieved?
by moving the neutral point of both elevator tabs
what does each trim tab have?
its own actuator powered by an electric motor
how are the trim motors powered?
standby trim, or the MFC
What connects the trim actuators?
a flexible shaft which synchronises movement of the tabs
what will happen if we have an automatic pitch trim differntial of 0.7 degrees or more?
PITCH TRIM ASYM caution
AP will disconnect
normal and standby pitch controls inhibited
what does the STBY pitch control switch do?
drives both electric motors of the trim actuators in he desired direction
how long does full pitch trim travel take?
30 seconds
what is full pitch trim deflection?
5 degrees up
- degrees down
what does the pitch trim indicator represent?
position of the right pitch trim actuator
what does a yellow pitch trim pointer mean?
pitch assymetry detected
pitch mistrim or pitch trim failure with autopilot engaged
pointer outside green band before take off
wha does the green sector on the pitch trim indicator represent?
2.5 degrees up
0 degrees down
what will a trim outside the green on TO or during config test mean?
we get a master warning, chime and CONFIG on EWD
what does a magenta bug on the pitch trim indicator mean?
managed pitch trim target
which control column is the stick pusher connected to?
the captain
what does a stick pusher shaker button caution mean?
AOA probe disagreement
power for stick pusher motor is lost
what activates the stick pusher?
MFC
what 5 components make up the yaw system?
- travel limitation unit
- trim actuator
- releasable centering unit
- rudder damper
- yaw trim switches
how is the rudder controlled?
rudder pedals feeds to the spring tab
autopilot feeds to the yaw actuator
what does the RCU do?
centres the rudder when no force is applied to the pedals
on the ground with no air load, what will the rudder spring tab do when the rudder reaches one of its stops?
it will move i the opposite direction
what does the spring tab do in the air?
moves in the opposite direction to the rudder when it reaches the stop in order to reduce pilot workload.
its deflection increases with airspeed
what does the TLU do?
restricts rudder movement based on airspeed
how does the TLU work?
recievs data from ADC’s and moves a fork to restrict rudder movement
in automatic mode, when will the TLU engage?
airspeed above 185 knots
in automatic mode, when will the TLU disengage?
airspeed below 180 knots
what will we see on the EWD when rudder travel is not limited by the TLU?
TLU LO SPEED
in auto mode, what data does the TLU use?
ADC information
what 5 things can cause a TLU FAULT?
- limiting fork position disagreement
- dual ADC failure
- airspeed data disagreement
- TLU position synchronisation failure
- multiple failures in the CAC
what does the yaw damper do?
- regulates rudder travel speed in flight
- limits rudder movement on ground caused by wind
what powers the yaw trim motor?
DC EMER BUS
how long does full rudder trim travel take?
15 seconds
when is rudder trim inhibited?
when autopilot is enagaged
what does an amber rudder trim mean?
yaw mistrim
auto trim failure with yaw damper engaged
when will the rudder centering unit (RCU) disengage?
when trimming
how are the outboard and inbaord flaps linked>
mechanically by a connecting pin and connecting rods
what can we see if the flap lever is out of detent?
amber strip on bottom of lever
what controls flap actuation?
4 flap actuators, through a flap control switch unit, MFC, and flap valve block
what does a cyan flap indication mena?
extension/retraction or flap position greater than 1 degree in disagreement
when will flaps become inoperative?
if difference in flap setting exceeds 6.7 degrees as as sensed by the MFC. this can only be reset on the ground
what are the inboard and outboard flaps connected by?
push pull rods
what minimises flap assymetry if the push pull rods fail?
a pin that connects the 2 panels
what does a red FLAP UNLK mean with a master warning?
flaps are extended and they retract more than 4 degrees uncommanded
how does the CAC sense a flap jam?
takes the average left and right position and if this is more than 1 degree out for more than 30 secs it will create an amber FLAPS JAM
what prevents an excessive power setting when in hotel mode?
the gust lock
how are the ailerons locked with gust lock engaged?
electro mechanical locing device
how far past the neutral position can the ailerons be locked?
left or right 5 degrees
when will we get an amber AIL LOCK LIT
one of the locking actuators disagrees with the position of the gust lock
can the gust lock be put in with the controls in any position?
yes but the controls must be brought back to neutral to positively lock them
what powers the spoiler unlock lights?
DC BUS 1
what powers the normal pitch trim system?
DC EMER BUS
what powers STBY PITCH TRIM system?
DC BUS 2
what disables the stick shaker/pusher and stall audio aleert?
STICK PUSHER SHAKER button to off
what supplies stick pusher system power?
DC BUS 1
what powers the stick shakers?
DC BUS 1 and 2 to their respective sides
how can the TLU we controlled in the event of a fault?
by using hi speed or lo speed positions on the toggle switch
what powers the TLU system?
DC BUS 1
what powers yaw trim?
DC EMER BUS
