Service Management - Spare Part Delivery 
Purpose
The customer reports a damaged part on a piece of equipment. The information about the equipment, customer, and damage is stored in a service notification. The object information screen displays the structure of the equipment (material number of the spare parts).
A sales order is generated directly from the notification and processed when the spare part information is entered. When the notification is saved, the sales order is also saved in the background.
Process Flow
You can find the data for this process under

Instead of working with the defaulted equipment number, you can also create your own equipment number if you first run the process
Selling a Serialized Product and Creating an Equipment Master Record .