Thales FMGS - Speed

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FMS GENERAL DESCRIPTION

12 FMGS OPERATION

 Speed

Managed Speed

Managed Speed mode is engaged by pushing the FCU SPD/MACH

Selector knob.

The speed is controlled by the FMGC.

− On PFD the Target Airspeed is displayed in magenta,

− On FCU the Speed/Mach Window is dashed and the Managed

SPD/MACH Dot is displayed,

− On MCDU (PERF page), MANAGED mode is confirmed with the target

value.

Selected speed

Selected Speed mode is engaged by pulling the FCU SPD/MACH

Selector knob,

The speed is controlled by pilot action on the FCU.

− On PFD the Target Airspeed is displayed in blue,

− On FCU the Speed/Mach window displays the Target Airspeed,

− On MCDU (PERF page), SELECTED mode is confirmed with the target

value (which is the reference for FMS computation in the current

flight phase).

The auto-thrust mode indicated on the FMA does not distinguish

between managed and selected Speed/Mach.

J43126AA 00

AIRBUS A318/319/320/321