Which option shows the change of departure time for UAL10 CID 111 to 1145?

• A. AM UAL10 07 P1145
• B. AM UAL10 111 07 1145
• C. AM 111 P1105 CHG P1145
• D. AM UAL10 07 P1105

Answer: (C)

When you need to communicate a change to a scheduled departure, the message must show which aircraft, what time was originally planned, and the new time, explicitly marked as a change. The correct line does exactly that: it starts with the time window (AM), then the aircraft identifier (111), then the previous planned time (P1105), and finally the change directive (CHG P1145) to new departure time 1145. This structure clearly ties the update to the correct flight and shows the old time and the new time.

Other options fail because they don’t include the explicit change instruction or omit the aircraft identifier, so they don’t unambiguously communicate that a departure time is being altered.