KLM MD-11 - Supplemental Data; Polar Navigation

MD-11 Flight Crew Operations Manual
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FMS -
Controls and Displays
FMS.30.122
• Aircraft achieves cruise level operation.
• Aircraft captures the descent path.
• Pilot performs any speed edit.
If an EO is detected above the 2 engine max altitude while the aircraft is already
in descent, the thrust limit will again go to MCT, but the aircraft will be flown with
idle-thrust down to the FCP altitude. The aircraft will maintain the current speed
target which was active at EO engagement. This yields a 3 engine speed/profile
and does not result in any undue pitch changes. When the aircraft reaches the 2
engine maximum altitude, it will then start flying with reference to the 2 engine
descent path, or a 2 engine cruise depending upon pilot selected cruise flight level
entered on the INIT page.
WARNING:
If current speed is less than DD speed, the FMS will
enter a DD mode but the aircraft will not descend until the FCP
altitude knob is dialed down. DD mode is a speed on pitch mode
with throttles at MCT. The aircraft will fly level in FMS PROF
and speed until the FCP altitude window is lowered regardless of
speed. The aircraft will not depart the clearance altitude with
FMS modes engaged. If the FCP altitude is not dialed down and
speed decays to VMIN, FMS PROF and SPD will drop out. If
speed decays to VMIN -10, AFS speed protection will engage and
the aircraft will depart the clearance altitude in order to maintain
VMIN.
NOTE: EO confirmation does not clear previously selected edit or max
speeds.
Supplemental Data
Polar Navigation
Polar Navigation Polar regions are north of 73 degrees north latitude or south of
60.5 degrees south latitude. In these polar regions the following occurs:
• IRU enters a true heading mode.
• PFD displays TRU in cyan.
• ND MAP displays TRU in white.
Flying south through 72.5 degrees north latitude, or flying north through 59.5
degrees south latitude, causes the IRU heading to display normally. In this region
radio navigation may not be available and the FMS will enter the IRS ONLY
NAVIGATION mode.
Above 85 degrees north or south latitude, the FMS transitions to a calculated FMS
true track mode. In this case, a magenta FMS TRACK will replace HDG on the
ND.
October 02, 2006