If ground spoilers fail to deploy, which switch setting is used to arm them for deployment?

• A. Place the GND LIFT DUMPING switch to MAN ARM
• B. Push the cargo discharge switchlight
• C. Turn on the emergency flaps switch
• D. Engage the roll disconnect

Answer: (A)

When ground spoilers aren’t coming down automatically, you can still prepare them to deploy by using the ground lift/dumping control set to manual arm. Setting the GND LIFT DUMPING switch to MAN ARM puts the spoiler system into a mode where you’ve explicitly armed it for deployment, so the spoilers will deploy when commanded or when the system detects the appropriate condition, even if the normal automatic sequence isn’t functioning.

The other options don’t affect the ground spoiler system: the cargo discharge switchlight is about releasing cargo, the emergency flaps switch handles a flap emergency, and the roll disconnect affects flight-control authority.