MD-11 Flight Crew Operations Manual
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Automatic Flight -
Controls and Displays
Auto.30.9
• Window displays the preselected altitude reference.
• Sets FMS clearance ceiling (climb) or floor (descent) when PROF is
engaged.
Pull to select:
• Disengages PROF (if engaged) and engages flight level change.
• Disengages vertical speed/FPA or altitude hold modes.
• Flight level change mode sets the ATS to climb thrust or descent idle
clamp and AP/FD pitch control to speed. The aircraft climbs or descends
directly to selected altitude.
• The aircraft will capture and hold any new altitude selected while in this
mode.
• The FCP altitude target becomes the displayed reference on the FMA.
Push to hold:
• Engages altitude capture/hold.
• Disengages PROF (if engaged).
• Disengages VERT SPEED/FPA mode (if engaged).
• Altitude target becomes the current altitude plus or minus a small value
required to give a smooth transition to level flight. This target value is
displayed in the FCP window, FMA, and on the PFD.
4. PROF Switch
Push to engage the FMS vertical profile guidance if not previously engaged.
After PROF engage, commands are supplied from the FMS (based on
inserted flight plan). On takeoff, PROF will not engage until 400 feet AGL.
On landing PROF can stay engaged until 50 feet. In takeoff mode, this switch
will also engage FMS speeds.
5. V/S-FPA Changeover Button
Pushing permits alternate display and control of either vertical speed in fpm
or FPA in tenths of degrees. When the V/S-FPA is not engaged, alternate
function is not selected until the pitch thumbwheel is rotated. After V/S or
FPA is engaged, the displayed value is always the selected value.
October 02, 2006
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