CPL Aircraft General Knowledge · Practice

Static wicks (static discharge wicks) are fitted to aircraft control surfaces and trailing edges. What is their purpose?

• A.To bond control surfaces to the main structure to prevent galvanic corrosion
• B.To provide a spark gap for lightning protection, diverting lightning strikes around the aircraft
• C.To measure the electrical charge on the airframe and alert the pilot to high static build-up
• D.To bleed accumulated static charge gradually into the airstream, reducing radio interference and electrical damage risk