Speed Brakes / Spoilers

Question 1

Is there any landing configuration when speed brake extension is inhibited?

Answer 1

• A319/A320 – Flaps FULL • A321 – Flaps 3 and FULL

Question 2

Discuss the ground spoiler logic on a rejected takeoff.

Answer 2

• Armed:
  
  • If the ground spoilers are armed and the speed exceeds 72 knots, the ground spoilers will automatically extend as soon as both thrust levers are set to idle.
• Not Armed:
  
  • If the ground spoilers are not armed and the speed exceeds 72 knots, the ground spoilers will automatically extend as soon as reverse is selected on one engine (the other thrust lever remains at idle).

Therefore, selecting at least idle reverse will always provide ground spoiler deployment.

Question 3

Discuss the ground spoiler logic on landing.

Answer 3

Deployment upon:

• Armed:
  
  • Main landing gears on ground
  • Both Thrust Levers in Idle or below Idle, OR Reverse Thrust is selected on at least one engine (and the other thrust lever is below the MCT position)
• Not Armed:
  
  • Main landing gears on ground
  • Reverse Thrust selected on at least one engine (and the other thrust lever is below the MCT position)

Partial Extension (Phase Lift Dumping):

• Armed:
  
  • One main landing gear on ground
  • Both thrust levers at or below Idle position
• Not Armed:
  
  • One main landing gears on ground
  • Reverse Thrust selected on at least one engine (and the other thrust lever is below the MCT position)

Bounce Prevention (Partial Deployment):

• Ground Spoilers Armed
• Main landing gears on ground
• Both Thrust Levers at or below Climb position

Retraction:

• After landing
• After a rejected takeoff, when the ground spoilers are disarmed
• During a touch and go, when at least one thrust lever is advanced more than 20 deg.

Question 4

When will the ground spoilers automatically retract?

Answer 4

During a touch-and-go / balk landing and at least one thrust lever is advanced above 20%.

Question 5

What are some conditions that inhibit speed brake extension?

Answer 5

(SAFET)

• S—SEC 1 and SEC 3 Failure
• A—Alpha Prot. or Alpha Floor
• F—Flaps in Config Full
• E—Elevator Failure (1)
• T—TOGA Thrust

Question 6

In flight, what happens if a spoiler fault is detected or electrical power is lost?

Answer 6

The spoilers automatically retract.