A330 Flight Controls Flashcards
Which spoilers are also used for roll control?
- Spoilers 2 to 6
What is MLA and what does it do?
When is it active?
- Manoeuvre Load Alleviation
- Redistributes loads over the wing to avoid wing bending
- Above 250kts, normal and alternate law, flaps zero
What happens when the maximum deflection of one of the spoilers has occurred during roll control and speedbrake use?
- The opposite side spoiler will retract until the roll control demand has been achieved
What does BYDU stand for and what does it do?
- Backup Yaw Damper Unit
- Activated when total loss of electrical power or
- total loss of all computers
- It provides yaw damping function
When does the high AoA protection activate?
What does it do?
- When the AoA becomes greater than AlphaPROT
- It maintains AlphaPROT (no backstick) or
- It maintains AlphaMAX (full backstick)
- Stops trimming nose up
What happens when the AlphaFLOOR protection kicks in?
- The auto-thrust sets go around thrust
- Aircraft may start a gentle climb
By how much does the FLRS retract the flaps?
- Just one stage (Flap FULL to 3, 3 to 2, 2 to 1)
If one spoiler on the wing fails on one side, what happens?
- The other symmetric spoiler is inhibited
- Except spoiler 4 and 6
On landing, when do the spoilers deflect if they have been armed? And if they have not been armed?
- As soon as main wheels touch down with thrust levers at idle
- As soon as reverse is selected on one engine with main wheels touched down and the other reverser selected to idle
How do you know when the aircraft is in mechanical backup law?
- Amber ‘x’ appears instead of green protection symbols (pitch and AoB)
- No AlphaPROT indication (amber/black stripes)
- ‘MAN PITCH TRIM ONLY’ (red) message appears on PFD
When does the high speed protection deactivate?
When the aircraft slow to below Vmo/Mmo
Which two control surfaces have a mechanical link?
- Trimmable Horizontal Stabilizer (THS)
- Rudder (on older models)
What happens to the outboard ailerons at high speed?
Why?
- above 190kts the outboard ailerons are controlled to the zero deflection position.
- To prevent aileron reversal, excessive wing forces, or damage
At what speed will the spoilers deflect on an RTO?
- Above 72kts groundspeed
What happens if one hydraulic system or SFCC is inop?
- Flaps/slats operate at half speed
Instead of a mechanical link to the rudder as on some older models of the A330, what do the newer models provide?
- Backup Control Module
What are the protection limits of the pitch attitude protection?
- 30 degrees nose up
- 15 degrees nose down
What happens if hydraulic pressure is lost to one of the spoilers?
It remains in the current position unless blown back by aerodynamic forces
How does one recover from the AlphaFLOOR protection?
- Decrease the AoA by easing forward on the side stick until past AlphaPROT
- Disconnect A/THR by disconnect pb
- Resume normal flight
When does “SPEED SPEED SPEED” alert occur?
- Immediately before AlphaFLOOR
- Between 100’ and 2000’
- Config 2,3, Full
- Normal Law only
When flying at AlphaMAX and the sidestick is released, what happens?
The aircraft returns and maintains AlphaPROT
When does AlphaFLOOR activate?
Between AlphaPROT and AlphaMAX
What is the ARS and what does it do?
- Automatic retraction system
- Retracts the flap in the 1+F config at 200kts to prevent over-stressing of the flaps
How long does one pilot have to push the sidestick takeover pb in order to deactivate the other sidestick?
40 sec
At what altitude does flare mode commence?
What happens to the THS and elevator controls?
- 100ft RA
- THS is frozen
- Elevator is directly controlled by side stick
During normal law, what is the bank angle limit the aircraft allows you to fly to?
67 degrees AoB
What protections are there in normal law?
- Load factor limitation
- Pitch attitude protection
- High AoA protection
- High speed protection
- Bank angle protection
How do you know that the aircraft is in normal law?
- The green bars (protection symbols) are displayed
- No ECAM message
- All the protecrions are available
When does the high speed protection activate? What does it do?
- When the aircraft exceeds Vmo/Mmo
- It applies a nose up order allowing the aircraft to return to the normal envelope
What does the small green bar symbol indicate on the speed tape?
- Vmo + 4kts and Mmo + 0.006
- Overspeed ECAM will activate
How do you know that the aircraft is in direct law?
- ECAM message
- Amber ‘x’ appears instead of green protection symbols (pitch and AoB)
- No AlphaPROT indication (amber/black stripes)
- ‘USE MAN PITCH TRIM’ (amber) message appears on PFD
- All protections are lost
If the speedbrakes are automatically retracted due to an inhibition (MLA, low speed, alpha floor,….) when can the pilot use the speedbrakes again?
- Once the inhibition factor is removed
- Speedbrakes need to be reset for at least 5sec
After a sidestick has been deactivated by the sidestick takover pb, can it be reactivated? How?
- Yes
- By pressing the takeover pb once
What is the FLRS and what does it do?
- Flap Load Relief System
- Retracts the flaps in config 2,3, FULL to prevent over-stressing
- Flaps will extend again when speed has decreased below threshold
What are WTB and what do they do?
- Wing tip brakes
- Stop flaps/slat movement in case of:
- asymmetry
- overspeed
- symmetrical runaway
If the rudder travel limiter fails in flight is rudder control limited?
Yes, but sufficient yaw control is available in all phases of flight
During high speed protection, what is the bank angle limit if you maintain a sidestick order?
45 degrees
If the sidestick is held back, will the aircraft stall?
If the protection is active it will maintain AlphaMAX
How many PRIM’s and SEC’s does the A330 have?
- 3 PRIM’s
- 2 SEC’s
What does the high speed protection do when the sidestick is kept full forward?
- At Vmo +16kts / Mmo + 0.04 the nose down pitch reduces to 0
(aircraft may still exceed this speed)
What ‘g’ loads does the load factor protection allow?
+2.5 to -1.0 g, slats retracted
+2.0 to 0 g, slats extended
How are the flight control surfaces controlled?
- Ailerons - Electrical
- Spoilers - Electrical
- Rudder - Mechanical (yaw damping and trim - electrical)(new model - all electrical)
- Speedbrakes - Electrical
- Elevator - Electrical
- Stabilizer - Electrical/Mechnical
Does the autopilot stay in during the high speed protection?
Yes unless the speed exceed Vmo + 12kts /Mmo + 0.03
What is the speed limitation on alternate law?
Vmo = 330kts Mmo = 0.82
In normal law in a steep turn, you release the sidestick. What AoB does the aircraft return to?
33 degrees AoB
Which controls are still available in mechanical backup law?
- THS through the trim
- Rudder through the rudder pedals
How many spoilers does the A330 have?
- 6 spoilers on each side
During high speed protection, what AoB does the aircraft command when the sidestick is released?
0 degrees AoB
When does abnormal attitude law activate?
- When the aircraft is in extreme attitudes
/speeds outside of the flight envelope protections
How do you know the aircraft is in alternate law?
- ECAM message
- Amber ‘x’ appears instead of green protection symbols (pitch and AoB)
- No AlphaPROT indication (amber/black stripes)
- Some protections are lost (pitch attitude, bank angle)
What does the Slats Alpha/Speed Lock Function do?
It inhibits slats retraction at high AoA and/or low speed
What happens if electrical power is lost to one of the spoilers?
- It is controlled to the retracted position
- The opposite side spoiler is inhibited
What is the speed limitation in direct law?
Vmo = 330kts Mmo = 0.80
What are the reconfiguration control laws?
(- Normal law)
- Alternate law 1
- Alternate law 2
- Direct law
- Mechanical law
- Abnormal attitude law
If the spoilers are not armed and an RTO is performed, will the spoilers deflect?
- Yes if
- Above 72kts
- At least one reverser is set to reverse (other at idle)
What does the flare mode do at 50ft?
It introduces a slight pitch down moment
