What is the required distance for engine/APU exhaust safety on a KC-10?

The safety requirement for engine or Auxiliary Power Unit (APU) exhaust on a KC-10 is set at a distance of 150 feet to ensure the safety of personnel and equipment during ground operations. This distance is critical to prevent injury from the intense heat and harmful gases produced by the exhaust, which can cause burns or harmful exposure to crew members and bystanders. Additionally, maintaining this distance helps to protect any sensitive equipment that might be damaged by the exhaust plume. Understanding and adhering to these safety protocols is vital for creating a safe working environment around the aircraft during refueling and maintenance operations. This standard reflects a well-established practice based on the potential hazards associated with aircraft operations, reinforcing the importance of operational safety measures in aviation settings.