What must a mechanic confirm regarding a weight distribution change?

A mechanic must confirm that a weight distribution change must remain within the normal operating envelope. This is crucial because aircraft performance and safety are directly influenced by weight and balance considerations. When an aircraft undergoes a change in weight distribution, it can affect various aspects of its handling characteristics, stability, and control.

Maintaining the aircraft within its normal operating envelope ensures that it is still safe to fly and that performance parameters such as stall speed, climb rate, and maneuverability are not adversely affected. Proper weight distribution helps in maintaining the aircraft's center of gravity within prescribed limits, which is essential for safe operation.

Altering the weight distribution outside of the normal envelope could lead to unpredictable flight characteristics, making it vital for mechanics to verify compliance with the guidelines set forth in the aircraft's documentation. This ensures that any modifications or changes do not compromise safety or operational effectiveness.