What action is prohibited within 50 feet of a refueling operation?

What action is prohibited within 50 feet of a refueling operation?

• A. Perform a preflight check
• B. Commence engine start or taxi
• C. Power down the aircraft
• D. Communicate with ground

Answer: (B)

Keep ignition sources away from the fueling area. Fuel vapors can ignite from even small sources, so starting the engine or moving the aircraft under its own power within 50 feet of refueling is not allowed. Those actions would bring heat, sparks, or hot exhaust into close proximity to flammable vapors. Other tasks, like a preflight check, powering down the aircraft, or coordinating with ground crew, do not introduce ignition sources and are not prohibited in this scenario. The key is to eliminate potential ignition near the fueling operation.

Keep ignition sources away from the fueling area. Fuel vapors can ignite from even small sources, so starting the engine or moving the aircraft under its own power within 50 feet of refueling is not allowed. Those actions would bring heat, sparks, or hot exhaust into close proximity to flammable vapors. Other tasks, like a preflight check, powering down the aircraft, or coordinating with ground crew, do not introduce ignition sources and are not prohibited in this scenario. The key is to eliminate potential ignition near the fueling operation.