Entry in this field is not required. However, if entry is made, it must be valid.
If you entered a component type in the previous field, this field defaults the first component of this type for the indicated equipment (as defined in EM Equipment). The default may be overridden, but it must be a valid component for this equipment.
If this is a Work Order line, this field is display only, and defaults the component assigned to this work order, if applicable.