According to FAR 91.213, what must be done with inoperative equipment before a flight?

Before a flight, any inoperative equipment must be deactivated and placarded in accordance with FAR 91.213. This regulation outlines the procedures for addressing inoperative instruments and equipment in aircraft, ensuring that they do not interfere with safe operation. Deactivating the equipment prevents accidental use or reliance on systems that are not functioning, while placing a clear placard helps inform all crew members and future flight crews about the status of that equipment.

Marking the equipment as inoperative provides critical situational awareness, allowing pilots to make informed decisions about the aircraft's capabilities and limitations. This process contributes to overall flight safety by ensuring that all personnel are aware of any discrepancies before the flight takes place.

While the other options may suggest different actions, they do not adhere to the regulatory requirements set by FAR 91.213 for properly handling inoperative equipment.