Who has the authority to authorize a move without brakes?

The Maintenance Officer (MO) possesses the authority to authorize a move without brakes due to their comprehensive understanding of the aircraft's maintenance status and operational safety protocols. The MO is responsible for ensuring that the aircraft is safe for movement, having the knowledge and authority to evaluate potential risks associated with moving an aircraft under unusual circumstances. This responsibility includes assessing the safety of the aircraft's condition and ensuring all necessary precautions are taken.

Other roles, such as the safety observer, tow tractor driver, or plane captain director, may play important functions in the moving process, but they do not have the final authority to approve such critical actions that involve potential risks. The MO’s authorization is a formal part of the safety chain that ensures all movements adhere to aviation safety regulations and standards, thereby mitigating risks to personnel and equipment.