Open flames should be strictly controlled or prohibited within what distance of any aircraft fueling operation?

Open flames should be strictly controlled or prohibited within a distance of 50 feet from any aircraft fueling operation due to the serious fire and explosion hazards associated with flammable fuels. Fueling operations involve the transfer of highly volatile liquids and gases, which can easily ignite in the presence of an open flame or spark.

Maintaining a 50-foot distance helps to ensure that any accidental ignition sources are kept at a safer distance from the fueling activity, protecting personnel, equipment, and the aircraft itself. The 50-foot safety zone serves as a precautionary measure to mitigate the risks associated with the volatile nature of aviation fuels and the potential for rapid fire spread in the unlikely event of a spill or leak during operations.

While other distances mentioned may seem plausible, regulatory standards and best practices within the aviation industry emphasize the importance of maintaining at least a 50-foot clearance to enhance safety during fueling operations.