Who must not leave the fueling unit unattended during fueling operations?

• A. The aircraft and the fueling operators
• B. The security officer on duty
• C. The maintenance team
• D. The pilot of the aircraft

Answer: (A)

Fueling operations are high-risk because fuel is flammable and a leak, spark, or static discharge can lead to a fire or explosion. To keep control of the situation, someone must be present at the fueling unit at all times to monitor equipment, manage bonding and grounding, observe for leaks, and be ready to stop flow or respond to emergencies. The most complete safety is achieved when both parties—the aircraft crew on and around the aircraft and the fueling operators at the fueling unit—remain present. If either side steps away, there could be a delay in shutting off the fuel, a missed warning, or an undetected leak, increasing risk. The other options involve personnel whose roles are not focused on fueling supervision, and they do not cover the requirement that both aircraft personnel and fueling operators stay with the unit.