SPD / MACH Window
Displays dashes when the speed/Mach is managed. Displays selected speed from the FCU or pre-selected speed from the MCDU.

Managed Speed Light
Illuminates to indicate an FMGS managed speed is being flown.

Heading / Track Window
Displays dashes when LNAV is engaged.

LAT Light
Illuminates to indicate managed lateral mode is either armed or engaged.

Flight Director Display Mode
Indicates that the flight director is in either HDG V/S or TRK FPA display mode.

ALT Window
Displays altitude selected with the altitude knob. The window never displays dashes, even when VNAV is engaged.

LVL / CH Light
Illuminates to indicate managed vertical mode is either armed or engaged.

V/S / FPA Window
Displays the vertical speed or flight path angle selected using the vertical speed/flight path angle knob. The applicable mode is controlled with the HDG-V/S TRK-FPA switch.

SPD / MACH Switch
When pushed, changes the value in the SPD/MACH window from airspeed to Mach, and vice-versa.

Speed / MACH Switch

• When rotated, changes the value displayed in the SPD/MACH window.
• When pulled, the selected speed displayed in the SPD/MACH window engages.
• When pushed, FMGS managed speed engages, the managed speed light illuminates and dashes appear in the SPD/MACH window.

Heading / Track Knob

• When rotated, changes the value displayed in the HDG/TRK window.
• When pulled, the selected heading/track displayed in the HDG/TRK window engages.
  • If a heading is selected prior to pulling the knob, the airplane turns in the shortest direction to the selected heading.
  • If a heading is selected after pulling the knob, the airplane turns to the new heading in the direction the knob is turned.
  • If the knob is pulled during a turn, the airplane rolls out on the existing heading.
• When pushed, LNAV engaes, the LAT light illumonates and dashes appear in the HDG/TRK window.

LOC Switch
Arms, Engages, or Disengages the LOC mode. It takes a minimum of 3 seconds after arming for the LOC to engage in the capture mode.

AP Switches
Engages/Disengage selected autopilot. Illuminate green when the autopilot is engaged.

Flight Director Mode Switch
When pushed, changes between heading/vertical speed and track/flight path angle display modes of both flight directors.

A/THR Switch
Arms or deactivates autothrottle system. Illuminates green if the autothrottle is armed or engaged.

Altitude Knob
Changes the altitude displayed in the ALT window.

• The inner knob rotates to change the altitude value.
• The outer knob provides selection of 100 or 1000 foot increments.
• When pulled, the open climb or open descent engages.
• When pushed, VNAV engages and the LVL/CH light illuminates.

EXPED Switch
Engages the EXPED mode to reach the altitude window with maximum vertical gradient. The expedite mode can only be disengaged by the engagement of another mode.

Metric ALT Switch
When pushed, the FCU altitude is displayed in meters on ECAM.

Vertical Speed / Flight Path Angle Knob

• When rotated, selects the vertical speed or flight path angle displayed in the V/S / FPA window.
• When pulled, vertical speed engages.
• When pushed, the airplane immediately levels off.

APPR Switch
Arms, Engages or Disengages the following modes:

• LOC and G/S modes if an ILS approach has been slected from the MCDU database.
• APP NAV, FINAL and FINAL APP modes if a non-precision approach has been selected from the MCDU database.