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of the aircraft to the reference waypoint.
UTC : Displays the predicted time of arrival at the reference
waypoint (computed using the current wind or a wind
vector, entered by the crew).
The time is only computed in cruise phase. In other
phases, it is dashed.
[ 2L ] and [ 4L ] TRU WIND
(blue)
The crew may enter the wind (direction/velocity) estimated at the
reference waypoint at the CRZ FL altitude.
This wind value is used to calculate the time from the position of the
aircraft to the reference waypoint, and to locate the equitime point.
If no entry is made, the wind/velocity field reads zero.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-28 P 121/126
FCOM 19 AUG 10
[ 2R ] and [ 4R ] ETP TO
XXXX (green)
Displays the bearing distance and the time from the Equi-Time Point
(ETP) position to the reference waypoint.
[ 5R ] ETP LOCATION Displays the ident of the F-PLN waypoint following the equitime point. It
provides the distance along the flight plan from the ETP to the indicated
waypoint.
[ 6L ] - [ 6R ] A/C TO (ETP)
DIST/UTC (green)
This field displays the distance from the current position of the aircraft
to the ETP along the flight plan, and the estimated time of arrival at the
ETP.
If at least one reference waypoint exists, but no ETP exists, the field is
blank and NO ETP is displayed in 6L.
Note: The ETP computation is based on the cost index, managed speed (with SPD LIM), and
predicted winds.
In case of engine-out, the EO LRC speed is assumed.
RTA PAGE
Applicable to:
,
,
MSN,,
4538,,
The RTA (Required Time of Arrival) page enables to enter a time constraint on a given waypoint.
When an RTA has been defined at a waypoint, the RTA page provides the following information :
‐ Predicted ETA at the time-constrained waypoint
‐ Performance adjusted SPD target
‐ Time error
‐ Distance to time constrained waypoint
‐ Active speed mode.
The RTA page also allows to enter an Estimated Takeoff Time (ETT), or may display an
FMS-computed ETT.
The flight crew calls up this page with the RTA prompt from the VERT REV page.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-28 P 122/126
FCOM 19 AUG 10
[ 1L ] – [ 1R ] AT
WPT/DIST/RTA
This line displays AT WPT and empty blue brackets, when no waypoint
has been specified, or AT WPT, DIST and RTA when a waypoint has
been defined.
The waypoint identifier is displayed in large blue font.
If only the waypoint identifier has been defined and no RTA value, blue
brackets and a blue star are displayed facing the 1R prompt.
The flight crew enters the time constraint as “HHMMSS”, preceeded
by :
A “–“ sign for “at or before”
A “+” sign for “at or after”
no sign for “at”.
[ 2L ] MANAGED (green) This field displays the FMGS-computed ECON speed/Mach (Refer to
STLO-22_20_R-40-10 GENERAL).
[ 3L ] ACT MODE (green) Displays the active speed mode : MANAGED or SELECTED/NNN
(NNN is the selected target speed).
The crew cannot modify the active speed mode via this field.
[ 6L ] TMPY F-PLN (yellow)
or RETURN (white)
The crew presses this key to revert the display to the VERT REV page.
The TMPY F-PLN prompt accesses the temporary F-PLN page.
[ 2R ] ETA (green) When a required time at arrival has been defined, the 2R field displays
the estimated time of arrival as “HHMMSS”.
[ 3R ] RTA ERROR This field is blank when the RTA is predicted as made.
If the RTA is predicted as missed, “RTA ERROR” is displayed in small
white font, and the calculated time error between the ETA and the RTA
is displayed in small amber font.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
CONTROLS AND INDICATORS - MCDU - PAGE DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_20-50-10-28 P 123/126
FCOM 19 AUG 10
[ 6R ] ETT The Estimated Takeoff Time (ETT) field is available in preflight phase.
If no ETT has been entered, the 6R field displays blue brackets and a
blue star. When an ETT has been entered, it is displayed in magenta.
This field may also display an FMS-computed ETT, when an RTA has
been defined.
UTC Universal time is displayed in green for takeoff, climb, cruise, descent
　
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