Which of the following is NOT a part of a JCN?

The job control number (JCN) is a unique identifier used within the Navy's maintenance management system to track and manage work. A proper JCN comprises several specific components, which facilitate the organization and tracking of maintenance activities.

The commands UIC (Unit Identification Code) is essential as it indicates the command responsible for the work being performed, ensuring that the work is linked to the appropriate unit. The alphanumeric code of the workcenter is crucial as it specifies where the work is to be carried out, thus allowing for accurate allocation of resources and personnel. The job serial number provides a unique identifier for each job to ensure that maintenance tasks can be logged, tracked, and reviewed accurately.

In contrast, while the work order description is important for understanding the nature and scope of the job, it is not part of the JCN itself. The description provides context to the work being performed but does not contribute to the structural makeup of the JCN. Hence, identifying the work order description as not part of the JCN is correct, as other components are structurally integral to the formation of a complete JCN.