Is it permissible to load avgas onto an aircraft with passengers on board?

Loading aviation gasoline (avgas) onto an aircraft with passengers on board is not permissible due to safety regulations. Having passengers present during refueling poses significant risks, including exposure to flammable vapors and the potential for accidents during the fueling process. The presence of passengers increases the complexity of the operation, as they may inadvertently interfere with safety protocols or become exposed to hazardous situations.

Regulatory bodies, such as the Federal Aviation Administration (FAA) in the United States, implement strict safety protocols regarding fueling operations to minimize the risk of fire or explosion. These guidelines specifically state that passengers should not be on board during refueling to ensure their safety and to comply with established safety standards.