From tis dialog you can specify e check tt are available at a Station.
The maintenace option when you right click on an aircraft row, is only available if you have an active entry.
Name of the Workshop. max 10 characters
Name of the performing company
Station where the checks are done
Type of check. From Maintenance filter
Aircraft filter. From Aircraft Filters
Hours and minutes
Sorting in the Maintenance activity dropdown list
Max. number of checks at the same time in the workshop.
See: User Guide > Flight Management > Schedule > Maintenance