When you post maintenance costs (from a general journal or a purchase invoice), you fill in the Maintenance Code field describing what kind of maintenance has been carried out (for example, routine service, repair).
Open the Maintenance window.
Fill in maintenance codes and descriptions. For Help about a specific field, click the field and press F1.
Close the window.
Setting Up Maintenance Information
Posting Maintenance Costs from Invoices
Posting Maintenance Costs from FA Journals