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intersection is from the end of the runway. For example, in PIT it is common to
use runway 28L intersection P. From the TPS pages you can determine the
distance available for takeoff (or just ask Ground Control!). Subtract that from the
full runway length and you have the intersection 1500’ from the end of the
runway. Enter 1500 on the TO SHIFT LSK.
If approach data (PERF APPR) is not entered within about 180 nm of destination
then MCDU will give error message saying so. So go ahead and get approach
data loaded, the electrons are free!
 Airbus Gotcha: If not within 200 nm of destination then aircraft will not initiate
descent in PERF DESCENT mode. Descent will be made in PERF CRUISE
mode as a “cruise descent”. During descent in cruise mode the FMGC will not
“see” crossing restrictions in the flight plan.
US Airways Airbus A319, A320, A321 Notes
72
 Airbus Gotcha: The aircraft will not initiate descent automatically from cruise
altitude when reaching a descent point (known as T/D or Top of Descent). The
pilot must set in new altitude and then push the ALT knob to enter Managed
Descent.
 Airbus Gotcha: The pilot cannot change the Descent data once the FMGC is
in Descent Phase. If you wish to make a change to the FMGC descent speed
once you are in Descent Phase, enter a new cruise altitude below your current
altitude into the PROG page. This will cause the FMGC to revert back to Cruise
Phase and allow you to enter a new descent speed in the PERF DES page.
The FMGC may plan a much slower speed for descent in Descent Phase than in
Cruise Phase. If the aircraft begins a descent and enters the Descent Phase
when you wish to make a faster cruise descent you can enter a new cruise
altitude on the PROG page below your current altitude. The FMGC will now
revert back to Cruise Phase until crossing the new altitude. Be aware, however,
that the FMGC does not “see” crossing restrictions when descending in Cruise
Phase and will only descend at a set vertical speed.
 Airbus Gotcha: Managed Climb/Descent is not available on heading. You
must be on NAV to use Managed Climb/Descent.
 Airbus Gotcha: When the aircraft is in HDG mode and the pilot enters direct to
a waypoint the autopilot will automatically engage NAV with no other action on
the pilot’s part. In other words, the autopilot will change modes automatically
from HDG to NAV when a DIR is entered in the FMGC. The point here is to be
sure of where the waypoint is when you enter DIR as the airplane will
automatically turn to the new waypoint as soon as it computes the new course.
DIR will always turn the shortest distance to the point. If the aircraft begins to go
the wrong place or turn the wrong direction (for example turn left instead of an
assigned right turn) use HDG mode until you can correct the problem.
 Airbus Gotcha: WARNING: Do not use UPDATE AT on the PROG page! The
Update At feature (PH 17.6.44) will shift the FMGC to the new position. This will
destroy the accuracy of your FMGC. Note: does not affect IRU’s.
 Airbus Gotcha: Changing the arrival or runway after putting in crossing
restrictions will delete pilot entered crossing restrictions and you will have to reenter
them.
US Airways Airbus A319, A320, A321 Notes
73
To enter a new waypoint you have several options. Of course, you can always
just type in the name if you know it, in this case BURLS intersection on the
SHINE arrival into CLT. If you do not remember the format for creating a new
waypoint just type HELP and press a LSK just as you would enter a waypoint.
You will then be shown the four formats for new waypoints to be entered.
LAT/LONG (latitude / longitude) Example: 3551.5N/08158.3W
(dot, slash, dot)
P/B/D (Place / Bearing / Distance) Example: CLT/314/64
(slash, slash)
P-B/P-B (Place – Bearing / Place – Bearing) Example: CLT–314/HMV–171
(dash, slash, dash)
PD (Along Track Waypoint, FMS2 only) Example: Shine/10 or Shine/–10
(waypoint slash plus, minus)
Note: Along Track waypoints or waypoint “slewing” or uptrack/downtrack on the
course using a + or – is NOT available for the original FMS. Use a P/B/D on the
course if possible.
Note: In the flight plan on the MCDU a P/B/D is shown as a PBD. The pilot
created waypoints will be numbered so the first PBD is shown as PBD01 and the
second as PBD02 and so on. The P-B/P-B waypoints are shown as PBX so they
appear as PBX01, PBX02 and so forth. Along Track waypoints are PD01, PD02,
etc. LAT/LONG waypoints are shown as LL01, LL02 and so forth.
　
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