When the autothrottle switch is moved to the armed position, which thrust mode will display on the FMA?

• A. Takeoff mode
• B. Arm mode
• C. Climb mode
• D. Roll mode

Answer: (B)

Arming the autothrottle puts the system into a ready state, and the Flight Mode Annunciator (FMA) reflects that by displaying ARM. This indicates the autothrottle is prepared to control thrust but has not yet captured a thrust target or TOGA setting. The thrust mode would switch to a specific active mode (such as Takeoff or Climb) only after a thrust command is engaged; until then, ARM shows that the autothrottle is armed. Roll mode is a lateral mode, not a thrust mode, so it wouldn’t appear as a thrust display.