Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-16
26-Jul-2017
deflections / trim adjustment to archive the commanded flight path. The flight control computers, FCCs,
calculation are based on data from the inertial reference system and air data computers.
Further input sources are selections made on the flight control panel, flight management computer outputs
and radio system outputs.
FLIGHT DIRECTOR
At this point we like to emphasize the difference between the flight director and the autopilot again. The flight
director indicates the needed attitude to archive a pre-set flight path based on selected mode by means of two
cross-hair bars or a v-shaped indication on the PFD’s attitude direction indicator. The flight director does not
control any actuator, flight controls, engine parameters or such to follow the flight path. It is solely for
indication.
The autopilot on the other hand controls the flight control’s servos and actuators to make the aircraft fly along
the pre-set flight path in accordance with the programmed modes. Basically, the autopilot will do everything
needed to follow the flight director.
Bear in mind that the CRJ has no auto throttle – during take-off, climb and go-around you get help from the
FADEC and fixed throttle detents (see later chapters) but especially during descent and levelling off after
descent you must monitor speed closely and adjust thrust as necessary.
The programmed / selected modes are split up in lateral and vertical modes and are presented on the PFD on
top of the attitude direction indicator. The following section introduces and explains the available modes.
Click the FD pushbutton to activate and deactivate the flight director.
Dave allows you to select different types of flight directors as this
differs between companies.