Flight Controlls Flashcards
How many pitch trims are there
3 -
main electric
Autopilot (different input channel to main)
Manual
How is roll provided?
8 wing spoilers, ailerons
Control wheel jammed - aileron
FO’s control will work for spoilers
Control wheel - spoilers jammed how can you control
Captain uses control from ailerons
If only ailerons or spoilers work what happens to control
Will rate reduced - at least 10 degrees from FO to initiate spoiler movement
What speed does Mach trim operate
M0.615
Stab trim override switch
Allows for reverse trim
Stab trim cut out switches
Isolate the main and AP system to stop trim runaway
What hyds power the rudder
A B AND SBY
Primary flight control feel
Elevator - Q feel or artificial
Rudder and aileron - spring
LE devices at F5
Le slats - extended
Le flaps - fully extended
LE flaps F5+
Le flaps - fully extended
Le slats - fully extended
SFP aircraft identified by
W.1
SFP approach to ground idle time
2 seconds (normally 5)
Spoiler deployment SPF
All spoilers deploy to 60degrees
Non SFP - flt spoilers at 33-38 and gnd spoilers at 52
Flap load relief at what flap
SFP - 10-40
Non SFP - 30-40
Flap load relief how does it work
Flaps auto raise if speed limit exceeded (leaver doesn’t move but gauge shows change)
Flap load relief operating speeds
Auto retraction 1kt above auto re extension when 4kts below
Auto gnd spoiler conditions:
Hyd A
Spd brk leaver armed
Armed light Iluminated
<10 ft radalt
Right main gear hits gnd
Wheel spd/spin >60kts
Max flap alt
20,000ft
With spd brakes what happens to roll rate
Increased
Q feel -
Hyd a and b and dynamic pressure sensed by elevator and then vary control pressure to regulate feel
Stall management yaw damper?
Gives false q feel near stall to make it hard to pull back on controls
FEEL DIFF PRESSURE light
Comes on after 30’ seconds of diff pressure between A and B of over 25%
When are you likely to see feel diff pressure
MC after elec 1 pump on and elec 2 is off without NWS pin
Speed trim system
Low gross weight with aft CG and high thrust, get auto trim to stay spd stable
Speed trim and Mach trim controlled by what computer
AP FCC
When does electric and AP speed trim change
Flap not up - hi speed
Flap up - low speed
Manual and electric trim ranges
Manual uses larger range
Elevator trim with ap in does what?
Disconnects AP
Does rudder trim and YD make pedals move
Rudder yes - yaw damp no
Flap aysym
Flap at fault doesn’t move and needles split
Flap skew
Side at fault needle goes in opposite direction of flap leaver movement
Spd brake load alleviation
If beyond 50% moves it back automatically
Spoilers on RTO -
When selected or automatically on selection of REV
Move TL with spoilers deployed on gnd
Stows spoilers automatically
Alt flap selection Lims
Any movement needs 15 seconds
Full cycle 5 mins
LE with alt flaps
Fully extend - can’t be raised
Auto slat effect on LE
If LE slats extended and you approach stall they fully extend
Autoslat SFP vs normal
1-25 on SFP
1-5 on normal
Main rudder PCU authority >135 kts
Reduces pressure by 25%
Sby yaw damper active?
With hyd a and b fail and on sby system
If A or B fails is there any control degradation?
No degradation (half the spoilers roll effected?)
LE FLAP TRANSIT Amber until when on alt flap selection
when TE reaches:
SPF - 15 deg
Non SPF 10 deg
Total Hyd failure effect on spoilers -
No spoilers - nothing do do with reversion or control jam logic with capt and fo
Aileron trim switch is where
Aft electronics panel
Force flight monitor ?
If a and b give different pressures/malfunctioning - detects this and transfers to sby rudder
FLT CONTROL - OFF
Isolates primary controls via cut off valve
Does not effect sby pump
ALT flap to arm -
Closes TE bypass valve - activated Stby pump and arms alt flap swx
Forget to arm SPD brk leaver GND spoilers will deploy
Wheel speed +60
Idle trust
Using reversers
Flt spoilers I’d you move leaver past flight detent -
Won’t go past it
Alt flaps use what motor
DC
Aysymetry protection is on which flaps
Trailing edge not leading edge
Skew protection is on which flaps?
Trailing edge and
LE slats
Protection for improper position
LE only
Get LE FLAP TRANSIT light
Protection for uncommanded motion
Le and te devices
SPD BRK DO NOT ARM LIFGT
Abnormal condition
Test imput
Below 60kts and leaver not down
SPD BRK EXTENDED LIGHT
Extended in landing config below 800ft
LE TRANSIT LIFGT IS INHIBITED
during auto slat ops
Do the pitch trims for AP and electric use different motors
NO
How many gnd spoilers per wing
2
