SH Chapter 9 - Flight Controls Flashcards
1) What does ELAC stand for?
Elevator Aileron Computer
2) How many ELACs are installed?
2
3) What are the functions of the ELAC?
Normal elevator and stabilizer and aileron control
- Normal pitch and roll, Normal Law
- Alternate pitch, Alternate Law
- Direct pitch and roll
- Abnormal attitude
- Aileron droop
- Acquisition of autopilot orders
4) Under Normal Law, what does ELAC 1 control?
Ailerons
5) Under Normal Law, what does ELAC 2 control?
Elevator and trimmable horizontal stab
6) What does SEC stand for?
Spoiler Elevator Computer
7) How many SECs are installed?
3
8) What functions are performed by the SECs?
- Normal roll (by controlling spoilers)
- Speed brakes and ground spoilers
- Alternate pitch (SEC1 & SEC2 only)
- Direct pitch (SEC1 & SEC2 only)
- Direct roll
- Alternate LAF
- Abnormal attitude
9) Under Normal Law, what do the 3 SECs control?
Spoiler control and standby elevator and stabilizer control
10) What is the sole purpose of SEC 3 in Normal Law?
Spoiler control only (spoiler 1 & 2)
11) What is the definition of FAC?
Flight Augmentation Computer
12) How many FACs are installed?
2
13) What are the functions of the FACs?
- Normal roll (coordinating turns and damping)
- Rudder trim
- Rudder travel limit
- Alternate yaw
14) Is full rudder deflection available during all flight regimes?
No. Maximum rudder deflection decreases as speed increases
15) How are the flight control surfaces controlled and actuated?
Electronically controlled and hydraulically actuated
16) When is automatic pitch trim available?
In normal law (up to 33 bank turn)
17) How is roll control normally achieved?
Wingtip aileron and augmented by 4 spoilers per wing
18) If the Rudder Travel Limit system fails, is maximum rudder deflection available?
Freezes in current limit and full rudder authority returned with extension of slats
19) With only Green hydraulic system pressure available, will both the flaps and slats
operate?
Yes, but will operate at half speed.
20) What system prevents flap or slat asymmetry?
Wingtip brakes (WTBs)
21) What causes the WTBs to activate (ROAM)?
R - Runaway
O - Mechanism overspeed
A - Asymmetry
M - Uncommanded movement
22) If the WTB activates due to a flap asymmetry, can the slats still operate?
If flap WTB are on, can still operate the slats
If slat WTB are on, can still operate the flaps
23) How may Slat/Flap Control Computers (SFCC) are installed?
2
24) What would occur if one Slat/Flap Control Computers (SFCC) failed?
Slats and flaps operate at half speed
25) What flap/slat configurations correspond to position 1 on the FLAPS lever and how do they differ?
1 - Slats extend to 1, if over 100 kts
1+F - Flaps extend to 1 and slat extend to 1 if speed under 100kts
26) In what situation will the Flaps automatically retract?
At 210 kts, prior to Vfe
27) What is Alpha Lock?
Inhibits slat retraction at high AoA and low speeds
28) What is indicated when the FLAP legend appears in cyan on the upper ECAM display?
In transit
29) What happens to the ailerons when the flaps are extended?
Aileron Droop - Ailerons extend 5 degrees down
30) Is there any landing configuration when speed brake extension is inhibited?
When flaps are Config 3 or Full
31) When do the Ground Spoilers automatically extend?
Rejected Take Off
- Spoilers armed and speed above 72kts, as soon as thrust levers to idle
- Spoilers not armed and speed greater than 72 kts, as soon as one engine to reverse
Landing
- Spoilers armed - both main gear on ground and both thrust levers at idle or reverse selected on one lever and below MCT on the other
- Spoilers not armed - both main gear on ground and reverse selected on one engine and other lever below MCT
32) At touchdown with reverse selected and only one landing gear strut compressed, will the ground spoilers extend?
Yes, but only partially (Phased lift dumpling)
33) When will the ground spoilers automatically retract?
- After landing
- After RTO when ground spoilers disarmed
- During touch and go when one thrust lever advanced above 20 degrees
34) When is speedbrake extension inhibited (SAFET)?
S - SEC 1 & 3 have faults A - AoA protection active F - Flaps full E - Elevator has fault T - Thrust levers above MCT
35) With spoilers not armed, will the spoilers deploy for an RTO?
Yes, as soon as one thrust lever to reverse and the other below MCT
36) In flight, what happens if a spoiler fault is detected or electrical power is lost?
Automatically retract to zero
37) What is the difference between the A320 and A321 regarding speed brake usage with the AP on?
Can only get half speed brakes with AP on in 320. Can get full in 321
38) What protection/s do you have in Normal Law?
B - Bank (67 degrees)
Y - Yaw (RTL and coordination)
P - Pitch (30 degrees nose up and 15 degrees nose down)
A - AoA
L - Load factor (2.5 to -1 clean & 2 to 0 dirty)
39) How does the High Speed Protection operate?
As speed increases above Vmo/Mmo, sidestick nosedown authority is reduced and permanent nose up order applied. On 321 the pitch trim freezes
40) Can the pilot override the auto pitch-up associated with High Speed Protection in Normal Law?
No, but can hinder it
41) What is Alpha Max?
Maximum AoA in normal law
42) How does High AoA protection operate?
Activates when current AoA exceeds Alpha Prot
- Maintains AoA equal to Alpha Prot without pilot input
- Modifies normal law and side stick input becomes AoA demand rather than Load Factor
43) What protection do you have in Alternate Law?
Load factor only
44) Can you override the high speed stability in Alternate Law?
Yes
45) What protections do you have in Direct Law?
None
46) If you are in Pitch Alternate Law, what law would Roll be?
Roll direct law associated with yaw alternate or mechanical, depending on the failure
47) When is there a direct relationship between sidestick and flight control surface deflection?
Ground mode of normal law (for flight control check)
48) How would you get into Abnormal Attitude Law?
Basically double the normal law limits
- Bank angle above 125 degrees
- Pitch attitude above 50 degrees NU or 30 ND
- Speed below 70-90 or above 440, or Mach above .91
- AoA above 40 degrees
49) What is the purpose of Abnormal Attitude Law?
Provide maximum efficiency to PF to recover to normal attitude
50) After recovery from an unusual attitude, what law will you be in?
Pitch and yaw alternate and roll direct
51) Will Abnormal Law revert to Direct Law on landing gear extension?
No
52) What PFD indications indicate Normal Law?
“=“
53) What is indicated if the PFD pitch and bank limits are amber Xs?
Alternate law
54) What would cause you to revert to another law?
Multiple failures of redundant systems
55) What law are you in when you perform the flight control check on the ground?
Normal law, ground mode
56) Can the aircraft be flown with a loss of all flight control computers?
Yes, mechanical backup
57) How is the aircraft controlled in Mechanical Backup?
- Pitch is manual trim wheel
- Lateral is rudder pedals
- Speed is manual thrust levers
58) How is the THS normally operated in flight?
ELAC2 sets the trim required automatically
59) If NO hydraulic power is available can the THS be positioned?
No
60) If a complete flight control computer failure occurs can the THS be positioned?
Yes, with trim wheel
61) Can you move the PITCH trim wheel if all systems are working normally?
Yes, manual input always has priority over electrical control
62) What happens to the THS when the aircraft enters into Ground Mode?
Auto reset to zero (after pitch attitude is less than 2.5 seconds for at least 5 seconds)
63) What does the red arrow in the SIDE STICK PRIORITY light mean?
The pb the arrow is illuminated in front of is losing authority
64) How would you regain control if you had just lost sidestick authority?
Pushing side stick takeover pb
65) What do flashing green CAPT and F/O SIDESTICK PRIORITY lights indicate?
Both side sticks are being moved and neither has taken priority
66) What happens when both pilots make an input simultaneously on the sidesticks?
Green CAPT and FO lights flash on SIDE STICK PRIORITY pbs and “DUAL INPUT” aural message
67) What happens if you turn the Rudder Trim with the autopilot engaged?
Nothing. Knob not active.
68) Does the rudder RESET button work with the autopilot engaged?
No
69) When is the side stick position indication icon (white cross) displayed?
When on ground with at least one engine running
70) Can the aircraft be flown with a loss of all hydraulic systems?
No
