Takeoff with a center tank fuel load in excess of 500 LBS is not permitted unless what condition is met?

Takeoff with a center tank fuel load in excess of 500 LBS is not permitted unless what condition is met?

• A. Each main wing tank is above 4,400 LBS
• B. Center tank is below 500 LBS
• C. Wing tanks are above 2,000 LBS each
• D. Center tank is full

Answer: (A)

Center fuel in the tail area changes where the airplane’s weight sits, so takeoff with a center tank load over 500 pounds must be balanced by enough fuel in the wing tanks to keep the center of gravity within approved limits. The reason this specific wing-tank condition matters is that with a heavier center tank, you need a certain amount of wing-fuel mass distributed outboard to offset that weight and maintain stable, controllable acceleration and climb performance. When each main wing tank has at least the stated amount (the heavy wing-fuel condition), the airplane’s balance stays within the allowed envelope throughout the takeoff and early climb, reducing the risk of an out-of-limit CG. Other options don’t guarantee that balance. For example, having wing tanks above an arbitrary number that doesn’t ensure proper offsetting of the center-tank weight won’t assure the CG remains within limits, and relying on the center tank being full or on a lower wing-tank level doesn’t address the necessary balance requirement for a takeoff with center-tank fuel above 500 pounds.

Center fuel in the tail area changes where the airplane’s weight sits, so takeoff with a center tank load over 500 pounds must be balanced by enough fuel in the wing tanks to keep the center of gravity within approved limits. The reason this specific wing-tank condition matters is that with a heavier center tank, you need a certain amount of wing-fuel mass distributed outboard to offset that weight and maintain stable, controllable acceleration and climb performance. When each main wing tank has at least the stated amount (the heavy wing-fuel condition), the airplane’s balance stays within the allowed envelope throughout the takeoff and early climb, reducing the risk of an out-of-limit CG.

Other options don’t guarantee that balance. For example, having wing tanks above an arbitrary number that doesn’t ensure proper offsetting of the center-tank weight won’t assure the CG remains within limits, and relying on the center tank being full or on a lower wing-tank level doesn’t address the necessary balance requirement for a takeoff with center-tank fuel above 500 pounds.