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A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - REQUIRED TIME OF ARRIVAL (RTA)
A318/A319/A320/A321 FLEET DSC-22_20-60-120 P 2/6
FCOM 19 AUG 10
SELECT the RTA key.
ENTER a waypoint at which a time constraint is to be defined.
WRITE the time constraint (+/–HHMMSS) into the scratchpad and ENTER
The display automatically reverts to the F-PLN A page.
Note: ‐ The TIME CSTR can be directly cleared on the F-PLN A page, using the CLR key.
‐ The time constraint is automatically deleted in the following cases :
• Engine out, or
• When entering a holding pattern, or
• In case of Go-Around, or
• A time constraint is entered at another waypoint, while another time constraint
already exists.
A scratchpad “RTA DELETED” message is displayed.
GENERAL
Applicable to:
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A time constraint (RTA) may be assigned at any waypoint of the F-PLN, downpath of the origin and
the FROM waypoint. It can be an ”AT”, “AT OR BEFORE”, or “AT OR AFTER” constraint.
The FMS computes a new managed speed profile from the aircraft position to the constrained
waypoint, in order to match the 30–rdbnmc􀀃cheedqdmbd􀀃􀀋ΔS(􀀃adsvddm􀀃sgd􀀃shld􀀃oqdchbsdc􀀃􀁄s􀀃sgd
constrained waypoint and the RTA. This modified managed speed profile can be checked using the
speed prediction, displayed for each waypoint of the F-PLN page.
The RTA function uses a speed range between Green Dot speed and VMO - 10 (or MMO - 0.02).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - REQUIRED TIME OF ARRIVAL (RTA)
A318/A319/A320/A321 FLEET DSC-22_20-60-120 P 3/6
FCOM 19 AUG 10
When the constrained waypoint is sequenced, the ECON SPD/MACH is resumed unless the
constrained waypoint is located in a descent segment.
The time constraint is inserted on the RTA page. A time constraint may be inserted at any waypoint
of the active or secondary flight plan.
If an engine-out condition is detected, the time constraint is automatically deleted and RTA
DELETED message on scratchpad.
If the aircraft enters a holding pattern, the downpath time constraint is deleted.
Once inserted in the F-PLN, the RTA is displayed in magenta on the F-PLN page, as long as no
predictions are available. On the PERF page, the Cost Index value is replaced by “RTA CI”.
Once the predictions are available, the time constraint is replaced by the new predicted time at the
associated waypoint,and highlighted by a star : (*)
The (*) is magenta, if the ‐ time constraint is matched with the 30–second criteria.
‐ The (*) is amber, if the time constraint is missed.
Time constraint matching criteria :
Mnsd9􀀃ΔS􀀃hr􀀃sgd􀀃shld􀀃cheedqdmbd􀀃adsvddm􀀃sgd􀀃shld􀀃oqdchbsdc􀀃􀁄s􀀃sgd􀀃bnmrsq􀁄hmdc􀀃v􀁄xonhms􀀃􀁄mc􀀃sgd
RTA. It is used to define the “missed” or “made” status.
ENTRY OF A REQUIRED TIME OF ARRIVAL
PRESS the F-PLN key.
SELECT VERT REV at any waypoint.
SELECT the RTA prompt [2R].
ENTER the waypoint at which a time constraint is to be defined in the [1L] field
When accessing the RTA page, the [1L] field is defaulted to the waypoint at which the vertical
revision has been performed.
WRITE the RTA in the scratchpad and ENTER in the [1R] field.
The format to be used is :
‐ ”HHMMSS” for “AT HHMMSS” (ex : “124500”)
‐ ”+HHMMSS” for “AT OR AFTER HHMMSS” (ex : “+124500”)
‐ ”-HHMMSS” for “AT OR BEFORE HHMMSS” (ex : “-124500”)
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - REQUIRED TIME OF ARRIVAL (RTA)
A318/A319/A320/A321 FLEET DSC-22_20-60-120 P 4/6
FCOM 19 AUG 10
Note: The ‐ RTA can be directly cleared on the F-PLN A page, using the CLR key.
‐ The time constraint is automatically deleted in the following cases :
• Engine out, or
• When entering a holding pattern, or
• In case of Go-Around, or
• A time constraint is entered at another waypoint, while another time constraint
already exists.
In case a time constraint is deleted, the “RTA DELETED” scratchpad message is
displayed.
　
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