Flight Contorls Flashcards
What 2 systems make up the Flight controls
Primary flight controls
Flaps and slats
Normal levels of primary flight controls and flap/slats control
Primary –> Normal - Secondary - Direct
Flaps/Slats —> Primary - Secondary - Alternate
What does the 787 have to fix control jams
Jam override Mechanism
How does the Fly-by-wire work
Norm -
Pilot - ACES’s - PFC’s - ACE’s - Actuators
Secondary
Pilot - ACES - Actuators
Where can you see the Flight control operating mode
Flight control Synoptic
Describe the flaps and Slats
Fly-by-wire
Slats - 6 and 1 Krueger flaps
trailing edge flaps - single slotted flaps inbd and outbd
What are the positions of the Slats and Krueger flap
Slats - Cruise/Take off/Ldg
Krueger flap - Retract or Deployed
Describe the Flap settings
7 positions
FL UP FL 1 (Slats only to mid) Gate 1 FL 5 FL 15 FL 20 Gate 2 FL 25 (Slats only to full) FL 30
Slats extend at Flap 1 position (middle) and Flap 25 (full)
T/O - 5, 15, 20
LDG - 25, 30
What flight controls are available incase of loss of all three HYD
Stabilizers
2 Spoilers
(both Electric)
How many ACE’s
4
How many spoilers
7 per wing
When is rudder effective
> 60 kts
What are the 4 flight control power sources
remember one it the back up
Left HYD
Center HYD
Right HYD
Electirc
What provides Electrical power for control services
PMG’s - 3 perminant magnetic generators
- 2 on left one on right
if no gen rotation - 28 VDC system on main Batt
What are the flight control surface locks
and what if they are left on
Maint to provent surface movement (tail and Wings)
if left on auto unlock at >40 kts on T/O
What are Back drive actuators
position the controls so as to simulate the movement of controls
Which FC mode can be selected by a switch
Direct
When is back pressure required when banking
30 deg
How is pitch provided
Elevators and Horizontal stabilizer
auto - gear, flap, speed brakes, config changes < 30 deg bank
What controls the Elevators
2 actuators each driven by different HYD systems
What are the Pitch enevlope protections
Stall - PFC limit trim to Vma
Overspeed - Trim
tailstrike - Auto elevator defliction
Can you trim with A/P
no
What is the Trim Reference Speed
Speed A/C would stabilize if there were no control column inputs
How do the PFC’s reconfigure the A/C
Auto adjust the stabilizer to reduce forces and streamline the A/C
Where is Stabilizer Position displayed
EICAS and Flight Control Synoptic
Where is the T/O range indicated
Green band on EICAS
What is Stab Cut out and where is it
Cut out L2 and R2 switches
just blow the speed brake
What are the Stab operating modes
Norm - L1 & R1
Secondary - L1 OR R1
Direct - none
How can we control pitch if Stab is stuck
Elevators
In normal mode does the trim switch move the stab or elevators
elevators and Trim Ref Speed modifies
Does movement of Primary or ALT pitch switches when A/P engaged cause A/P to disengage
No
the switches are inhibited
How is roll provided
Ailerons and Flaperons and augmented by spoilers
is there aileron tirm
no
describe the aileron and flaperon
Each aileron and Flaperon has 2 actuators
Powered by 3 HYD systems
Where can you set the bank limit
Below the HDG
What is the AUTO Bank Limit
35 deg
force brings back to 30 deg
How are the 14 spoilers powered
10 HYD 4 Electric (4+5 & 10+11)
1 actuator per spoiler
When do Speed Brake Lever go to up
Landing gear on the ground and
thrust levers not in T/O range
When do Speed brakes Deploy
Landing - Thrust reverse to idle
T/O - >85 power to T/O then to idle
What is the auto drag function
Assist to slow if high on approach
- Extending ailerons and spoilers (2 outbd)
- only at landing config 25 or 30 thrust idle
What is Rudder Ratio changer
Changes the rudder feel as A/S increases
What is Gust suppression
auto application of flight controls in gusts of turb
A/P and VNAV or ALT
Where is the Rudder position displayed
EICAS
What happens to the Rudder Trim on T/O
Man trim auto zerod during T/O roll
> 30 kts until airborne
What do the flaps and Slats do
Lift devices
increase wing lift
decrease stall speed
what positions of flap selection dont move the flaps
FL 1
FL 25
What are the 3 slat positions
Up, Middle, Full
What does flap indicator Green and Magenta mean
Green - at selected
Magenta - in transit
When are flaps/slats inhibited
> 260 kts
>20,000 ft
What is Auto Gap
Changes the slat from middle to full < 225 kts
What is Flap Load Relief
Protects flap from excessive air loads
auto retracts to safer position
(displayed on EICAS)
How can you tell you are in Secondary mode of Flaps and Slats
Direct?
EICAS display
Secondary - Flaps appear broken up into segments
- limited to FL 20
Direct - Segmented but also shows index marks
- REMEMBER NO PROTECTIONS FOR DIR
What is cruise flaps Auto
minor movement of flap/ailerons/flaperons/spoilers
> 25,000ft
A/S 0.54 -0.87 Mach
(normal mode)
