Why is it typically required to jack an aircraft indoors for weighing?

Jacking an aircraft indoors for weighing is crucial primarily to prevent air currents from destabilizing the scales. When weighing an aircraft, precision is of utmost importance, and air currents can cause fluctuations in the readings. These fluctuations can lead to inaccurate weight measurements, compromising the safety and performance data needed for operational assessments. Indoor environments generally provide a more controlled atmosphere where airflow can be minimized, ensuring that the scales provide stable and reliable readings.

In addition, while other factors such as ground vibrations and equipment access may also play a role in weighing procedures, the primary concern that necessitates indoor jacking is the management of air currents. This enhances the accuracy and reliability of the weight measurements taken during the weighing process.