F2000EX EASY
02-22-10
CODDE 1
PAGE 17 / 22
DGT94085
ATA 22 – AUTO FLIGHT
DESCRIPTION
ISSUE 3
DASSAULT AVIATION Proprietary Data
AUTO-THROTTLE MODES
The Auto-Throttle is working in two different modes:
-
speed mode,
-
thrust mode.
Speed mode
In this mode, throttle positions will permanently be adjusted to maintain the selected
speed / Mach number.
Associated AP vertical modes are: ALT, VALT, VS, PATH, VPTH, GS, VGP, ASP.
In MAN speed, the reference target speed / Mach number (selected through action on the
PUSH CHG toggle button) will be displayed in the speed digital readout on the GP. On
FMS speed modes, dashes are displayed in the speed digital readout on the GP. The
FMA displays a green A/T SPD indication, the reference speed value and the associated
bug.
A speed reference bug can be:
-
: MAN,
-
: FMS,
-
: tear-drop display when MAN / FMS speed < Low Speed Cue + 5.
The TD will provide a thrust command to capture and hold the reference speed / Mach
number. If reaching the reference speed / Mach number takes too long or is impossible, a
LIM amber indication will be displayed on the FMA (in the AT status area): to achieve the
target capture, PF action will be necessary (extend or retract airbrakes, change flaps
configuration, …).