Systems Guide

A318/A319/A320/A321
Professional
SYSTEMS
Systems guide
Vol
4
04-03-16
11 July 2018
FLIGHT GUIDANCE
Flight guidance is provided for speed control, lateral navigation and (limited in this project) vertical
navigation. There are two types:
• Selected Guidance: In this mode the aircraft will fly on autopilot using the settings on the FCU.
You switch from managed mode to selected mode by pulling (right mouse click) the SPD, HDG
and ALT knobs.
• Managed Guidance: In this mode the airspeed is calculated by the FMS and differs per flight
phase. The FMS also provides managed lateral and vertical flight plan guidance following the
flight plan that has been inserted in the MCDU. The FCU will show dashes in managed guidance.
You switch from selected guidance to managed mode by pushing (left mouse click) the SPD, HDG
or ALT knobs.
Please note the FCU altitude window will never be dashed.
When the autopilot is engaged or the flight director is activated the Flight Mode Annunciator (FMA)
(at the top of the PFD) will also display the activated settings.
LATERAL GUIDANCE MODES
The lateral guidance modes keep the aircraft course to its destination.
SELECTED HEADING (OR TRACK) MODE
The heading (or track) mode will guide the aircraft on a heading (HDG) or track (TRK) and is the default
lateral mode. The pilot activates it by pulling (right mouse click) the HDG button on the FCU. A digital
display of the heading (track) will be shown on the FCU and HDG will be displayed on the FMA. Note this
mode cannot be activated when LAND mode is activated.
• If the knob is turned to the desired HDG (TRK) and pulled the aircraft will make the shortest turn
to the selected HDG (TRK)
• If the HDG knob is pulled but not turned the current HDG (TRK) is selected.
• If the HDG knob is pulled first and turned the aircraft will turn in the direction of the turn.
• If the HDG knob is turned but not pulled the selected value is cleared after a period that depends
on the flight mode.
MANAGED NAVIGATION MODE
When a flight plan is available and activated the managed nav mode will guide the aircraft along the path
stored in the FMS. It is activated by pushing (left mouse click) the FCU HDG knob. The display will show
dashes and the FMA will display NAV.
LOCALIZER LATERAL MODE
When the FCU LOC pb is pushed the loc lateral guidance mode is armed and the FGS will only use the
localizer signal for lateral guidance. In the FMA LOC will be displayed and the LOC pb will illuminate. It can
be used to intercept and track a localizer while maintaining a selected altitude. Note that a ILS frequency
must be tuned and TAKEOFF and GO-AROUND mode are not selected. To disarm press the LOC pb again.