Creating a Maintenance Call Manually 
Use
A manual maintenance call allows you to include additional dates for maintenance calls without affecting normal scheduling. You can specify the required call date and
maintenance packages which should be due on this date.The
call horizon is not considered for a manual maintenance call.Procedure
You reach the initial screen for scheduling maintenance plans.
You reach the Maintenance Schedule screen.
The system displays the Manual call field as ready for input.
You reach a dialog box in which you can select the required maintenance packages.
The packages selected are copied into the Packages due field.