How often should the cockpit equipment be checked for functionality?

The correct approach is to check cockpit equipment for functionality before each flight and during scheduled maintenance. Conducting checks before each flight ensures that all critical instruments and systems are operational and meet safety standards, which is crucial for safe operation. This pre-flight verification is part of standard operating procedures as it helps identify any issues that could affect flight safety, allowing pilots to manage or mitigate risks before takeoff.

Moreover, scheduled maintenance is an essential practice as it allows for a more thorough inspection and servicing of the cockpit equipment, ensuring that any wear and tear or potential failures are addressed according to the manufacturer's recommendations and regulatory requirements. This combination of pre-flight checks and regular maintenance helps maintain operational integrity and safety in aviation.