KLM MD-11 - FD Only ILS Operation

MD-11 Flight Crew Operations Manual
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Automatic Flight -
Description and Operation
Auto.10.11
The approach functions include localizer capture, localizer track, glideslope
capture, and glideslope track. The AFS approach and land modes are armed by
pushing the APPR/LAND switch on the FCP when the AP or FD is in any lateral
or vertical control mode except take-off or go-around and there is a valid ILS
frequency.
The localizer may be intercepted at angles up to 90 degrees, but high IAS and/or
intercept angles greater than 30-40 degrees may result in overshoot.
After the APPR/LAND switch has been pushed, LAND ARMED is displayed
above the FMA roll control window. At localizer capture LOC is annunciated in
the FMA roll control window, LAND ARMED transfers to above the FMA
altitude control window and the PFD bank angle limit becomes 30 degrees. If the
AP is engaged it will automatically capture and track the localizer. If flying FD,
the FD will supply commands to manually capture and track the localizer.
When the aircraft is stabilized on the localizer (localizer track), the bank angle
limit will reduce to 10 degrees. At 200 feet the bank angle will be further reduced
to 5 degrees.
As the aircraft intercepts the glideslope, the glideslope deviation diamond will
begin to move. At glideslope capture, G/S is annunciated in the FMA altitude
control window under the LAND ARMED annunciation. If flying AP, the aircraft
will capture and track the glideslope. If flying FD, the FD will supply commands
to manually capture and track the glideslope. During glideslope capture the pitch
attitude is limited to +15 and -5 degrees. Glideslope capture is inhibited if course
error is more than 80 degrees. Selection of any other pitch or roll mode prior to
land engage will cancel the land armed mode.
During ILS approach, the ATS speed reference is the FMS approach speed if FMS
speed is engaged. If FMS speed is not engaged, the reference is the IAS/MACH
display window setting in the FCP.
VOR approaches may be flown in the NAV and PROF modes by selecting the
appropriate VOR database approach and engaging NAV for lateral guidance and
PROF for vertical guidance or by following raw data with the use of appropriate
FCP controls. VOR approaches may be flown in NAV, TRACK, HEADING or
VOR.
NOTE: PROF down to the MDA is not authorized.
FD Only ILS Operation
The LOC and G/S annunciations will be white. When the glideslope is captured,
G/S APPROACH ONLY will be annunciated in the FMA altitude control window
and LAND ARMED will be removed.
Failures in any FD mode will result in removal of the command bar (for that
channel and axis only) on the affected PFD.
October 02, 2006