MD-11 Flight Crew Operations Manual
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Automatic Flight -
Controls and Displays
Auto.30.5
• Selects the preselected heading/track and cancels the previous lateral
mode. The aircraft follows and captures any selected HDG/TRK while in
this mode.
• The display window displays the selected HDG/TRK.
• Once the target HDG/TRK is captured, the system will automatically
transition to HDG/TRK HOLD mode and the selector must be rotated,
then pulled to select a new heading. During the capture phase, the
selected heading/track is changed when the selector is rotated.
Push to hold:
• Disengages the NAV mode (if engaged).
• Causes the aircraft to maintain the present HDG/TRK or, if the aircraft
was turning, the heading during the turn plus or minus a small predicted
increment to ensure a smooth rollout with no overshoot.
• Cancels VOR, LOC, NAV, and LAND ARMED modes.
• The window displays the capture HDG/TRK.
• Turning the knob in this mode preselects a new HDG/TRK. This requires
selection by pulling the knob.
Bank Angle Limit Selector (Outer Knob) -
Allows selection of maximum bank angle in 5-degree increments (5 to 25
degrees). In the AUTO position bank angle limits vary with speed (bank
limits decrease as speed increases). This selector cannot override
FMS-computed bank angle limits. Bank angle limits are displayed on the top
of the PFD attitude sphere.
4. NAV Switch
Push to arm the FMS NAV capture mode or resume FMS lateral control if the
capture criteria are satisfied.
The NAV armed mode can be cancelled by pushing HDG/TRK hold,
selecting APPR/LAND arm, capturing the ILS localizer, or by capturing FMS
NAV.
After NAV capture, commands are supplied from the FMS. NAV arming is
available on the ground once engines are started. NAV guidance is active at
100 feet AGL in FD mode. AP NAV guidance is not available until 400 feet
AGL.
October 02, 2006
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