Which form is used to document discrepancies discovered by aircrew or maintenance personnel before, during, and after each flight?

The correct form used to document discrepancies discovered by aircrew or maintenance personnel before, during, and after each flight is the AFTO Form 781A. This form serves as a critical component of flight operation documentation, allowing users to record maintenance discrepancies, trends, and recurring issues. It provides a structured way to ensure that all issues are formally logged, which is essential for safety and accountability in aviation operations.

The AFTO Form 781A acts as the primary record for discrepancies and is crucial for ongoing maintenance and repair tracking. This systematic documentation helps improve aircraft reliability and safety, making it an invaluable tool in aviation procedures. Other forms, such as the AFTO Form 46, AF Form 24, and AFTO Form 74, serve different purposes and do not specifically focus on capturing the range of discrepancies encountered during flight operations.