What must the applicant determine when weighing an aircraft certified under 14 CFR Part 23?

The requirement for the applicant to determine a well-defined and easily repeatable condition of the airplane when weighing an aircraft certified under 14 CFR Part 23 is fundamentally about ensuring accuracy and consistency in weight measurement. Establishing a specific condition means that the aircraft is in a controlled state during the weighing process, which includes considerations like the amount of fuel, oil, and other fluids on board, as well as any equipment or payload that may impact weight.

This condition helps to eliminate variables that could affect the weight and center of gravity calculations. By creating a standard procedure for weighing—such as weighing the aircraft with a specific amount of fuel or without cargo—the applicant can ensure that weights and balances can be compared accurately over time and with other aircraft. This approach is essential for maintaining safety and compliance with regulatory requirements.

The other options do not focus on the necessary precision and repeatability that weighing an aircraft requires. While draining fluids might be related to weight checks, it’s not a universal requirement. Similarly, the FAA does not directly set specific limits on how individual aircraft should be measured, nor can weight measurements typically be taken under arbitrary conditions without regard for standardization, which would compromise the accuracy of the data collected.