2000. This includes report times before the FLYING DUTY (to which the 900 hours refers) starts, and the clear time after any flying duty finishes, as well as any pure ground duties performed, such as training.
So looking at a longhaul crew member with approximately 4 trips /month minus leave plus SEP/MLD. You can add on another 120 hours? Still a long way from the theoretical 2000 hours.
