When approaching the rear of an idling turbojet or turbofan engine, the hazard area extends aft of the engine approximately how many feet?

When approaching the rear of an idling turbojet or turbofan engine, the hazard area extends aft of the engine approximately how many feet?

• A. 50 feet
• B. 100 feet
• C. 200 feet
• D. 300 feet

Answer: (B)

Jet blast from an idling turbojet or turbofan is still powerful enough to injure people or damage nearby equipment, even though the engine isn’t at full takeoff thrust. The hot exhaust stream can push debris off the ground and knock a person off their feet. Because of that risk, the safe hazard zone behind the engine is treated as extending to about 100 feet. This distance provides a practical buffer against the high-velocity plume and any loose objects it might pick up, taking into account variations in wind and engine behavior. In practice, always stay well clear of the rear of an idling engine, and only approach if the engine is shut down or you’ve been cleared by ground personnel and can ensure the path is safe.

Jet blast from an idling turbojet or turbofan is still powerful enough to injure people or damage nearby equipment, even though the engine isn’t at full takeoff thrust. The hot exhaust stream can push debris off the ground and knock a person off their feet. Because of that risk, the safe hazard zone behind the engine is treated as extending to about 100 feet. This distance provides a practical buffer against the high-velocity plume and any loose objects it might pick up, taking into account variations in wind and engine behavior. In practice, always stay well clear of the rear of an idling engine, and only approach if the engine is shut down or you’ve been cleared by ground personnel and can ensure the path is safe.