KLM MD-11 - AP;FD Speed Select;Hold (Flight Level Change)

MD-11 Flight Crew Operations Manual
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Automatic Flight -
Description and Operation
Auto.10.9
In altitude capture and hold modes, the ATS controls to the FCP-selected speed or
FMS computed speed (FMS SPD engaged). The speed control window on the
FMA will show THRUST and the altitude control window on the FMA will
display HOLD.
The altitude hold mode may be engaged automatically from the altitude capture or
vertical speed/flight path angle mode when the AP/FD is initially engaged and the
rate is less than 300 fpm and selected altitude error is less than 60 feet.
The altitude hold mode may be engaged manually by pushing the altitude select
knob on the FCP. Subsequent knob rotation selects the next increment for the
existing flight level. The altitude control and speed control windows on the FMA
show the same legends and colors as in altitude capture.
AP/FD Speed Select/Hold (Flight Level Change)
The AP/FD will capture and hold the FMA airspeed/Mach during climb/descent
when the climb/descent is commanded by pulling the FCP altitude select knob.
The commanded speed will be the FMS speed if the FMS SPD is engaged.
The commanded speed will be the FCP selected speed if the FMS SPD is not
engaged.
The commanded speed may be changed manually with the IAS/MACH select
knob on the FCP. Rotating the IAS/MACH select knob preselects a new speed
reference. Pulling the IAS/MACH select knob selects the FCP speed. Pushing the
IAS/MACH select knob selects the existing speed.
Rotating the IAS/MACH select knob on the FCP or pushing the FMS SPD switch
on the FCP changes the commanded speed reference only. AP/FD control modes
are not affected. An FMS speed reference failure will change the speed reference
to existing aircraft speed, change the FMA reference number color to white and
flash the speed mode legends 5 times.
Compatible control of the AP/FD and ATS modes is computed by the AFS when
FMS PROF is not engaged.
When the aircraft passes through 26,000 feet in climbout, the speed control will
automatically change from IAS to the equivalent Mach if the desired Mach was
not preselected.
If the desired Mach number was preselected, the reference will change
automatically to Mach at the preselected Mach number. Operation is the same for
the Mach-to-IAS changeover in descent.
October 02, 2006