Manual ground spoiler deployment method: which switch setting arms the system?

Manual ground spoiler deployment method: which switch setting arms the system?

• A. GND LIFT DUMPING switch set to OFF
• B. GND LIFT DUMPING switch set to MAN ARM
• C. GND LIFT DUMPING switch set to AUTO
• D. GND LIFT DUMPING switch set to ON

Answer: (B)

Arming the ground spoiler system for manual deployment means preparing it to respond to a pilot-initiated command rather than relying on automatic logic. The switch must be set to the manual arm position to enable this path. When in this armed state, pulling the spoiler command or pressing the corresponding manual input will deploy the spoilers on the ground. If the system is OFF, it is completely disabled and won’t deploy. AUTO uses the aircraft’s automatic logic (weight-on-wheels and other inputs) to deploy spoilers without manual input. ON would engage the system in a way that isn’t the required arming state for manual deployment.

Arming the ground spoiler system for manual deployment means preparing it to respond to a pilot-initiated command rather than relying on automatic logic. The switch must be set to the manual arm position to enable this path. When in this armed state, pulling the spoiler command or pressing the corresponding manual input will deploy the spoilers on the ground.

If the system is OFF, it is completely disabled and won’t deploy. AUTO uses the aircraft’s automatic logic (weight-on-wheels and other inputs) to deploy spoilers without manual input. ON would engage the system in a way that isn’t the required arming state for manual deployment.