Which term refers to the 12 hour block of time on the schedule that a reserve line holder must be available to work?

• A. Reserve Status
• B. Availability Window
• C. Line Availability
• D. Duty Window

Answer: (A)

Reserve status is the on-call period a reserve line holder must be available to work. In airline scheduling, reserve crews don’t have fixed trips; they stay ready to be called during a defined window. That 12-hour block on the schedule is the time you must be reachable and prepared to take a trip if called. If you’re dispatched to a flight, you go on duty; if not, you simply remain in reserve for that window. The other terms don’t fit as precisely: an availability window refers more to when you can be contacted, and a duty window implies actual time on duty after being called. Reserve status specifically captures the required on-call state for reserve crews.