What distance must you maintain from the aircraft when its engines are running?

Maintaining the appropriate distance from an aircraft with running engines is crucial for safety. When engines are operational, there is a risk of jet blast, propeller wash, and engine exhaust that can be hazardous to personnel and equipment in close proximity. The requirement to stay 25 feet in front or 200 feet to the rear of the aircraft helps ensure that individuals are out of the range of these potentially harmful effects.

The specifications for front and rear distances are based on the forces exerted by the aircraft engines when powered up, which vary between different types of aircraft. For instance, jet engines produce a significant amount of thrust and can create high-velocity exhaust that can cause injury if someone is within the proximity zone. Similarly, the area behind the aircraft is particularly dangerous due to the large wake turbulence and debris that can be kicked up by the engine's operation.

This safety protocol is designed to protect ground personnel and equipment while enhancing overall operational safety at the airfield. The other distance choices do not adequately account for the dynamic environment created by an aircraft in operation, thus making them less suitable for ensuring safety.