How many personnel should be present during aircraft fueling?

The correct answer is that three personnel should be present during aircraft fueling. This standard is in place to ensure safety and effective communication throughout the fueling process.

During fueling operations, one person is typically designated to operate the fueling equipment while another is responsible for monitoring the aircraft's fueling status and communicating with the fueling operator. The third person acts as a safety observer, ensuring that the area is secure and free from hazards, and is ready to respond in case of any emergencies. This three-person protocol not only enhances safety by providing oversight but also minimizes the risk of accidents or mishaps during a critical operation like fueling.

This approach aligns with established safety procedures in aviation maintenance and operations, emphasizing the importance of teamwork and vigilance in maintaining safe aircraft fueling practices.