What is the relationship between MTOW and CG checks?

• A. CG checks are independent of MTOW and may be ignored if weight is below MTOW.
• B. The CG envelope can exceed MTOW as long as CG is within forward limit.
• C. The aircraft must be operated with total weight at or below MTOW and CG within the approved CG envelope for all configurations.
• D. Only CG checks matter; MTOW is not relevant.

Answer: (C)

The key idea is that safe flight depends on both weight and balance limits being respected together. MTOW sets the absolute maximum weight the aircraft is allowed to have for takeoff and flight, while the CG envelope defines the permissible range of center of gravity positions for stability and controllability at those weights and configurations.

The correct approach is that the aircraft must be operated with total weight at or below MTOW and with the center of gravity within the approved CG envelope for every configuration. If you exceed the weight limit, structural and performance margins can be compromised; if the CG lies outside the envelope, controllability and handling can be unsafe, even if the weight is within limits. The CG envelope can depend on weight and configuration, so you must verify CG is within the appropriate envelope for that loading scenario.

Why the other ideas don’t fit: you can’t ignore CG just because weight is under MTOW, and you can’t exceed MTOW even if the CG happens to be within its forward limit. Also, MTOW remains relevant; it’s not replaced by CG checks alone.