Select "Fleet Management" -> "Fleet" and choose the fleet your aircraft is assigned to. If you did not change the fleet assignment you may find the aircraft in the fleet "default". All the aircrafts belonging to the fleet are listed here. In the row of each aircraft you find three symbols:
Click on the calendar symbol for scheduling.
On the top of the page you find some general information about your aircraft. Below are three tabs marked "Schedule", "Flights" and "Settings" (Those can be directly accessed through the three symbols mentioned above).