Which Air Force Instruction (AFI) contains the list of availability codes?

The correct answer is that AFI 11-421 contains the list of availability codes. This particular instruction specifically addresses flight operations and outlines various regulations and procedures that govern the availability of aircrew. The availability codes are crucial for managing personnel resources, ensuring that the right aircrew members are assigned to missions based on their qualifications and availability status.

Understanding AFI 11-421 helps aviation resource management professionals effectively track and maintain aircrew readiness, which is vital for operational success. The other AFIs listed do not focus on availability codes, as they pertain to different aspects of flight operations and management within the Air Force.