Which condition triggers a weight and balance check?

• A. Before each flight
• B. Whenever ACMS specifies it
• C. Only during initial delivery
• D. Sporadic weight check schedule

Answer: (B)

Weight and balance checks are prompted by changes that could affect the aircraft’s center of gravity, rather than done on a fixed timetable. The Aircraft Condition Monitoring System (ACMS) continuously analyzes data and can indicate when a W&B check is needed, such as after certain maintenance actions, configuration changes, or loading/discrepancies that might shift weight or CG. This targeted trigger helps ensure the aircraft remains within approved limits without unnecessary checks.

Performing a check before every flight is not always required, initial delivery is a one-time event, and a vague sporadic schedule isn’t a reliable trigger. When ACMS specifies it, the check is performed because the system has identified a condition that could affect weight and balance.