What does the HARM office maintain for aircrew?

The Flight Records Folder (FRF) is the correct choice because it is specifically designed to document the training and flight history of aircrew members. This folder includes essential records such as flight hours, training completions, and any qualifications achieved by the aircrew, which are crucial for tracking individual performance and compliance with regulations.

Maintaining an accurate and comprehensive FRF is vital for ensuring aircrew members meet the necessary standards and are ready for operational assignments. This focus on individual training and experience differentiates the FRF from other administrative functions that might be performed by different offices, such as logbooks for flight operators, which would typically not be managed by the HARM office, or maintenance records, which are more closely related to aircraft upkeep rather than aircrew qualifications. An inventory of operational aircraft is also not directly related to the management of aircrew records and would fall under a different area of responsibility.