How does rotor wash affect personnel and equipment during near-LZ operations?

How does rotor wash affect personnel and equipment during near-LZ operations?

• A. It generally has no safety impact on people.
• B. It can cause debris, dust, noise, and temporary blindness; maintain safe distances and use protective gear.
• C. It reduces debris in the LZ.
• D. It only affects crew onboard the aircraft.

Answer: (B)

Rotor wash is the powerful downwash created by helicopter rotors. In near-LZ operations this downwash can kick up debris and dust, create a loud, constant roar, and blow dust or smoke into the eyes or face, causing temporary visual impairment. These effects threaten personnel in the LZ area and can damage or move equipment and loose gear. The safe response is to keep people well clear of the rotor arc, establish a clear safety perimeter, and use protective gear such as eye protection and hearing protection. Ground crews should secure loose items and follow established signals and procedures to stay upwind or off to the side of the helicopter’s downwash. The other options underestimate the safety risks or misstate the effects.

Rotor wash is the powerful downwash created by helicopter rotors. In near-LZ operations this downwash can kick up debris and dust, create a loud, constant roar, and blow dust or smoke into the eyes or face, causing temporary visual impairment. These effects threaten personnel in the LZ area and can damage or move equipment and loose gear. The safe response is to keep people well clear of the rotor arc, establish a clear safety perimeter, and use protective gear such as eye protection and hearing protection. Ground crews should secure loose items and follow established signals and procedures to stay upwind or off to the side of the helicopter’s downwash. The other options underestimate the safety risks or misstate the effects.