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OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - TIME MARKER
A318/A319/A320/A321 FLEET DSC-22_20-60-100 P 2/2
FCOM 19 AUG 10
HOW TO INSERT A TIME MARKER
Applicable to:
,
,
MSN,,
4538,,
WRITE the time marker in the scratchpad. The entry format is HHMM.
SELECT any left key of the F-PLN A or B page, to insert the time marker in the active flight plan.
The time marker is inserted in the flight plan according to time criteria, irrespective of the key
choosen for entry.
Up to four time markers may exist in the F-PLN at a time. An attempt to enter a fifth time marker will
cause the “TIME MARKER LIST FULL” message to appear on the scratchpad.
The FMGS updates the time marker position with the predictions.
When the current clock time equals or exceeds the time marker entry, the FMGS sequences the time
marker (even in preflight).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - STEP ALTS
A318/A319/A320/A321 FLEET DSC-22_20-60-110 P 1/12
FCOM 19 AUG 10
STEP CLIMB/STEP DESCENT
Applicable to:
The STEP ALTS function enables to define the successive cruise Flight Levels. The optimum
position to initiate a climb, from the initial (or current) cruise Flight Level to the next one, can also be
determined.
PRINCIPLE
GEOGRAPHIC STEPS
Up to four geographic steps may be defined on the STEP ALTS page. These steps are initiated
at the geographical position, along the F-PLN.
Rules
‐ The minimum step size is 1 000 ft.
‐ A Step Climb (S/C) cannot follow a Step Descent (S/D).
‐ A STEP is automatically cleared, if :
• The S/C (S/D) is sequenced without any level change done by the crew.
• The crew achieves a LAT REV, which deletes the associated waypoint from the F-PLN
• By EO condition.
‐ A STEP is manually cleared :
• On the STEP ALTS page, by CLEARING the corresponding field.
• On the F-PLN page, by CLEARING the (S/C) or (S/D) pseudo-waypoints.
‐ A STEP entry is IGNORED, if the remaining CRZ distance is less than about 50 nm.
‐ Once the steps are inserted in the F-PLN, they are displayed :
‐ On the MCDU, as (S/C), (S/D), (T/C), (T/D) pseudo waypoints.
‐ On the ND, by associated , , , white symbols.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - STEP ALTS
A318/A319/A320/A321 FLEET DSC-22_20-60-110 P 2/12
FCOM 19 AUG 10
OPTIMUM STEP
Once geographic steps are inserted or an altitude is entered, the FM proposes an OPTIMUM
STEP start of climb position for the first step climb altitude ahead : Fuel/time savings are
displayed, if above 100 kg/min. If no savings are found, no optimum step is proposed.
The OPT STEP is not automatically inserted. The crew must insert it, if appropriate. Once
inserted, the OPT STEP point (OPT) becomes a fixed geographical point.
If some F-PLN parameters are subsequently changed (e.g. winds, new waypoints), an update
of the optimum position relative to the previous one may be proposed. If savings exist, this new
optimum may be inserted to replace the previous optimum step point.
Once an OPT STEP is inserted in the F-PLN, and the crew achieves a lateral F-PLN revision,
the FM keeps the (OPT) along the new F-PLN, at the same distance from the aircraft’s position,
as previously determined.
Rules
‐ The OPT STEP is only computed by the FM, if data required for the prediction computation
are inserted : F-PLN, CRZ FL, CI, GW, CG at least.
‐ The search of the OPT STEP begins 20 nm beyond (T/C) before Cruise, or ahead of the
aircraft’s position.
‐ The search of the OPT STEP ends 20 nm before the next STEP POINT, or 300 nm before
the (T/D).
‐ Only one OPT STEP is computed at a time.
Guidance
When reaching the step point, the steps must be initiated by the crew by selecting the new
CRZ FL, and pressing the FCU ALT selector knob. If sequenced without any crew action, the
step is automatically deleted.
If the crew initiates the step :
The CRZ FL is automatically ‐ reassigned to its new value.
‐ The guidance is THR CLB/CLB for a step climb.
THR IDLE/DES with V/S = -1 000 ft/min for a step descent.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
OTHER FUNCTIONS - STEP ALTS
A318/A319/A320/A321 FLEET DSC-22_20-60-110 P 3/12
FCOM 19 AUG 10
STEP ENTRY
The STEP ALTS page is either accessed from
the
: ‐ The VERT REV page, or
　
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