Flight Control Systems

What happens when speedbrake extension is inhibited while the speedbrakes are already extended?

Which of the following conditions does NOT inhibit speedbrake extension?

What is the maximum deflection angle for spoilers 2 to 6 under normal conditions?

In what situation is the symmetric speedbrake surface on the opposite wing inhibited?

What takes priority when both roll order and speedbrake order are applied to surfaces 2 to 6?

Speedbrake Control

Flight crew controls speedbrakes with a lever.
Speedbrakes are spoilers 1 to 6.
Speedbrake extension is prevented if:
- MLA is active.
- Angle-of-attack protection is active.
- Low speed stability is active.
- At least one thrust lever is above MCT position.
- Alpha floor is activated.
If an inhibition occurs, speedbrakes retract automatically and stay retracted until the inhibition condition ends and the flight crew resets the lever (they can be extended again 5 seconds later).
If a speedbrake surface on one wing fails, the corresponding surface on the other wing is inhibited.

Spoiler Deflection Limits

Maximum deflection for spoiler 1: 25°.
Maximum deflection for spoilers 2 to 6: 30°.
Maximum deflection is reduced in configurations CONF 2, 3, and FULL.
For spoilers 2 to 6 (which have roll and speedbrake functions), roll function has priority.
If a roll command and a speedbrake command combined exceed the maximum deflection, the opposing speedbrake retracts until the deflection difference is equal to the roll command.

This quiz focuses on the control of speedbrakes in aircraft systems, including their limitations and conditions for operation. Key topics include lever actions, maximum deflection limits, and failure responses. Test your knowledge of speedbrake functionality and associated regulations.