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The system automatically retracts the spoilers to their zero position, if it detects a fault or loses
electrical control.
If the system loses hydraulic pressure, the spoiler retains the deflection it had at the time of the
loss, or a lesser deflection if aerodynamic forces push it down.
When a spoiler surface on one wing fails, the symmetric one on the other wing is inhibited.
SPEED BRAKES AND GROUND SPOILERS
Applicable to: MSN,
4473
The pilot controls the speedbrakes with the speedbrake lever.
The speedbrakes are actually spoilers 2, 3 and 4.
Speedbrake extension is inhibited if :
SEC1 ‐ and SEC3 both have faults.
‐ An elevator (L or R) has a fault (in this case only spoilers 3 and 4 are inhibited).
‐ Angle-of-attack protection is active.
‐ Flaps are in configuration FULL.
‐ Thrust levers above MCT position.
‐ Alpha Floor activation.
If an inhibition occurs when the speedbrakes are extended, they automatically retract and remain
retracted until the inhibition condition disappears and the pilots reset the lever. (The speedbrakes can
be extended again, 10 s or more after the lever is reset).
When a speedbrake surface on one wing fails, the symmetric one on the other wing is inhibited.
Note: 1. For maintenance purposes, the speedbrake lever will extend the N° 1 surfaces when the
aircraft is stopped on ground, regardless of the slat/flap configuration.
2. When the aircraft is flying faster than 315 kt or M 0.75 with the autopilot engaged, the
speedbrake retraction rate is reduced (Retraction from FULL to in takes about 25 s).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - ARCHITECTURE
A318/A319/A320/A321 FLEET DSC-27-10-20 P 10/22
FCOM 19 AUG 10
L3 The maximum speedbrake deflection in manual flight is:
• 40 ° for spoilers 3 and 4;
• 20 ° for spoiler 2.
The maximum speedbrake deflection with the autopilot engaged is :
‐ 25 ° for spoilers 3 and 4;
‐ 12.5 ° for spoiler 2.
The maximum speedbrake deflection with the autopilot engaged is achieved with half speedbrake
lever deflection.
For these surfaces (which perform both roll and speedbrake functions) the roll function has priority.
When the sum of a roll order and a simultaneous speedbrake order on one surface is greater than
the maximum deflection available in flight, the same surface on the other wing is retracted until the
difference between the two surfaces is equal to the roll order.
Applicable to: ,
, MSN,,
The pilot controls the speedbrakes with the speedbrake lever.
The speedbrakes are actually spoilers 2, 3 and 4.
Speedbrake extension is inhibited if :
‐ SEC1 and SEC3 both have faults.
‐ An elevator (L or R) has a fault (in this case only spoilers 3 and 4 are inhibited).
‐ Angle-of-attack protection is active.
‐ Flaps are in configuration 3 or FULL.
‐ Thrust levers above MCT position.
‐ Alpha Floor activation.
If an inhibition occurs when the speedbrakes are extended, they automatically retract and remain
retracted until the inhibition condition disappears and the pilots reset the lever. (The speedbrakes can
be extended again, 10 s or more after the lever is reset).
When a speedbrake surface on one wing fails, the symmetric one on the other wing is inhibited.
Note: 1. For maintenance purposes, the speedbrake lever will extend the N° 1 surfaces when the
aircraft is stopped on ground, regardless of the slat/flap configuration.
2. When the aircraft is flying faster than 315 kt or M 0.75 with the autopilot engaged, the
speedbrake retraction rate is reduced (Retraction from FULL to in takes about 25 s).
L3 The maximum deflection for the spoilers 2, 3 and 4 is 25 °.
For these surfaces (which perform both roll and speedbrake functions) the roll function has priority.
When the sum of a roll order and a simultaneous speedbrake order on one surface is greater than
the maximum deflection available in flight, the same surface on the other wing is retracted until the
difference between the two surfaces is equal to the roll order.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - ARCHITECTURE
A318/A319/A320/A321 FLEET DSC-27-10-20 P 11/22
FCOM 19 AUG 10
Applicable to:
The pilot controls the speedbrakes with the speedbrake lever.
The speedbrakes are actually spoilers 2, 3 and 4.
Speedbrake extension is inhibited if :
‐ SEC1 and SEC3 both have faults.
‐ An elevator (L or R) has a fault (in this case only spoilers 3 and 4 are inhibited).
‐ Angle-of-attack protection is active.
‐ Flaps are in configuration FULL.
　
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