What must be done to the cart brakes prior to takeoff and landing?

Prior to takeoff and landing, it is essential to set the cart brakes. This action ensures that the cart remains stationary and secure, preventing any movement that could disrupt cabin safety or cause injury during critical phases of flight. Properly setting the brakes allows flight attendants to focus on their safety duties and ensures that the cart itself does not roll or shift unexpectedly.

The need to set the brakes is particularly important during these phases because the aircraft may experience changes in speed and direction that could otherwise affect unsecured equipment. By ensuring the brakes are engaged, flight attendants can maintain a safe environment for passengers and crew.

While checking the brakes and maintaining them is important for overall operational safety, the specific step that must be taken just before takeoff and landing is to set them to prevent any potential hazards. Lubricating the brakes is a maintenance task that should be addressed outside of the immediate pre-takeoff and pre-landing procedures.