Section VII
Systems
VII-22-2
LATERAL MODES
Roll Hold Mode (Basic Roll)
The basic lateral mode of the FGS is roll hold. Roll hold consists of two
submodes - roll and heading hold. If the roll attitude of the aircraft is
less than 5° at mode activation, the system generates commands to
maintain the existing aircraft heading (wings level). If the roll attitude is
between 5° and 30° at mode activation, the system generates
commands to hold the aircraft's existing roll angle. If the roll attitude is
greater than 30° at mode activation, the system generates commands
to hold the roll angle at 30°.
Heading Select Mode (HDG)
When in heading select mode, the system generates commands to
capture and maintain the selected heading shown on the PFD and/or
MFD. The selected heading is set by the HDG knob on the FGP.
Heading mode is selected by pressing the HDG switch on the FGP.
Modes Activated
by
Control
Functions
Roll Hold (Basic) - - - -
Heading Hold, Roll Hold
Heading Select
HDG
Heading Select, Lateral
Navigation
NAV
FMS, Localizer, VOR
Approach
APPR
FMS, Localizer, VOR
Back Course
B/C
Localizer Go Around
Go Around
GA (Control Wheel)
Heading Hold
Half Bank
1/2 BANK
Bank Command limited
to 12.5°
10 Sep 2006
