When should used equipment during flight be reported to the captain?

The rationale for reporting used equipment to the captain before landing but before the next departure is centered around safety and operational efficiency. By addressing issues with the equipment while still in-flight, the flight crew can take necessary steps to ensure that the aircraft remains safe and compliant with operational standards. This early reporting allows for appropriate actions to be taken, whether it means preparing for potential issues upon landing or ensuring that any necessary maintenance can occur in a timely manner before the next flight.

This approach also provides the captain with critical information that can be used to assess the ongoing situation and make informed decisions. It emphasizes the importance of addressing equipment concerns promptly and ensuring the safety of both the crew and passengers throughout the flight's final stages and subsequent operations.