Why is the ADB essential for the plane captain?

The Aircraft Discrepancy Book (ADB) is a vital tool for the plane captain because it serves as a comprehensive record for verifying all outstanding Maintenance Action Forms (MAFs) and discrepancies related to the aircraft. This ensures that any issues or required repairs are clearly documented and addressed before the aircraft is released for flight operations, maintaining safety and operational readiness.

By closely monitoring entries in the ADB, the plane captain can keep track of mechanical discrepancies or maintenance actions that are pending, allowing for proactive management of aircraft maintenance priorities. This process helps ensure that all necessary inspections and repairs are completed, thus upholding the integrity and safety of the aircraft and crew.

While flight schedules, spare parts inventory, and daily flight logs are important aspects of overall aircraft management, they do not specifically address the critical need for oversight and resolution of maintenance issues, which is the primary function of the ADB.