Sales order change

Hi All

Iam using  standard sap repair process with repair sales order. When defective material received from customer then it comes directly into blocked stock  ( Movement 657 ) as we dont want to put it in quality stock.

After that We want to create service order automatically. System prompt for service order creation only when we goto VA02 and press repair tab-

Is there is any other way which would do this activity automatically without going into sales order change VA02. ?

Or

Any background program which would do this activity ?