True or False: The aileron ground adjustable trim tabs are for maintenance use only and should not be tampered with by aircrew.

The statement is considered true because aileron ground adjustable trim tabs are designed primarily for maintenance purposes. These trim tabs are typically set by qualified maintenance personnel to ensure the aircraft's flight characteristics are optimal during operation. They are not intended for adjustment by aircrew members during flight, as doing so could lead to unintended alterations in aircraft performance and handling qualities. By restricting adjustments to maintenance crews, safety is prioritized, reducing the risk of pilot error associated with improper trim settings while in the air.

The other options suggest circumstances under which aircrew might adjust these trim tabs, which deviates from the manufacturer's guidelines and operational standards, reinforcing the importance of keeping such adjustments confined to maintenance protocols.