The flight plan is divided into several phases: PREFLIGHT, TAKEOFF, CLIMB, CRUISE, DESCENT, APPROACH, GO-AROUND, DONE. Each phase except the preflight and done phases has a performance (PERF) page. The PERF pages display performance data, speeds, and predictions.
Pressing the PERF key on MCDU calls up performance page for current active flight phase. Pages for next phases can be viewed by selecting “NEXT PHASE” prompt. Pages for phases already flown are not available.
The page title for PERF page corresponding to active flight phase is green. Titles of pages for next phases are white
2L 1L
3L 4L 5L 6L
2R 1R
3R 4R 5R 6R
PREV PHASE: Select this prompt to access PERF page for previous phase. Not available for phases already flown.
ACTIVATE APPR PHASE: Shown on page corresponding to active phase. Selecting and confirming this prompt will activate APPROACH phase.
NEXT PHASE: Select this prompt to access PERF page for next phase.
6L 6L
6R
Note: When APPROACH phase is activated, the managed speed guidance will target Vapp speed or maneuvering speed for current aircraft configuration. If Approach phase is activated by a mistake using PERF pages, the CLIMB phase can be activated by re-inserting the Cruize FL value at PROG or INIT page.
A330 / A340
This page is displayed when pressing PERF key during preflight.
V1, Vr, V2: Takeoff V speeds. Speeds are NOT automatically computed, and pilot entry is required as indicated by amber boxes. Airbus pilots use performance tables to determine these speeds. You can, however, make the FMS compute the V speeds by clicking the line select keys with right mouse buttons.
TRANS ALT: Origin airport transition altitude. The barometric reference should be switched to STD when climbing above this altitude. Transition altitude is called up from database when origin airport is entered on INIT page.
THR RED/ACC: Thrust reduction and acceleration altitude. At thrust reduction altitude, the pilot retards thrust levers and thrust is reduced from TO to CLB. At acceleration altitude the SRS pitch mode is replaced by CLB mode, and speed target changes from V2+10 to climb speed. Both altitudes default to field elevation plus 1500 feet.
UPLINK TO DATA: Data link is not modelled.
RWY: Selected departure runway is displayed here. Runway entry cannot be performed through this field
TO SHIFT: Distance between takeoff position and runway threshold, used to update FMS navigation computation. Entry is not required.
FLAPS/THS: Takeoff flaps and trimmable horizontal stabilizer settings for takeoff. This field allows entry and is used for reminder only.
FLEX TO TEMP: Assumed temperature for FLEX takeoff thrust calculation is entered here, if derated takeoff is desired.
Entering high assumed temperature will reduce the takeoff thrust.
ENG OUT ACC: Engine out acceleration altitude.
1L
The center column shows computed Flap retraction, Slat retraction, and Green Dot speed.
2L
ACT MODE: Active target speed (ECON, selected SPD/MACH, or EXPEDITE). The pilot cannot modify it through this field.
CI: Cost Index, as entered on INIT page. Field accepts entry of new cost index.
ECON: ECON is the optimum speed considering cost index, altitude, and gross weight. Speed limits and speed constraints, if any, may prevent the aircraft from flying at the ECON speed.
SPD/MACH: If CLIMB phase is not yet active, the pilot can preselect climb speed by entry in this field. When CLIMB phase becomes active, if speed was preselected, the speed guidance changes to Selected, and FCU speed opens with preselected speed. In climb, entry in this field cannot be made. Pushing the Speed selector knob on FCU reverts to managed speed guidance and blanks this field.
1L
ACT MODE: Active target speed (ECON or selected SPD/MACH). The pilot cannot modify it through this field.
CI: Cost Index, as entered on INIT page. Field accepts entry of new cost index.
ECON: ECON is the optimum speed considering cost index, altitude, and gross weight. Speed limits and speed constraints, if any, may prevent the aircraft from flying at the ECON speed.
SPD/MACH: If CRUISE phase is not yet active, the pilot can preselect climb speed by entry in this field. When CRUISE phase becomes active, if speed was preselected, the speed guidance changes to Selected, and FCU speed opens with preselected speed. In cruise, entry in this field cannot be made. Pushing the Speed selector knob on FCU reverts to managed speed guidance and blanks this field.
1L 2L 3L
4L
A330 / A340
ACT MODE: Active target speed (ECON, selected SPD/MACH, or EXPEDITE). The pilot cannot modify it through this field.
CI: Cost Index, as entered on INIT page. Field accepts entry of new cost index.
ECON: ECON is the optimum speed considering cost index, altitude, and gross weight. Speed limits and speed constraints, if any, may prevent the aircraft from flying at the ECON speed.
SPD/MACH: If DESCENT phase is not yet active, the pilot can preselect climb speed by entry in this field. When DESCENT phase becomes active, if speed was preselected, the speed guidance changes to Selected, and FCU speed opens with preselected speed. In descent, entry in this field cannot be made. Pushing the Speed selector knob on FCU reverts to managed speed guidance and blanks this field.
1L
2L 3L
4L
2L
QNH: Entry field for destination sea-level atmospheric pressure. Entry can be made either in hPa (for example 1003) or in in Hg (29.92).
TEMP: Entry field for destination temperature.
MAG WIND: Entry field for destination magnetic wind direction and speed. Entry example is 15/270
TRANS ALT: Transition altitude for destination airport. When aircraft descends below this altitude, barometric reference should be changed from STD to QNH and destination pressure selected on BARO panel. Transition altitude is called up from database when destinatiom airport is entered on INIT page.
VAPP: The FMS computes this approach speed, using the formula Vapp = Vls + 5 +1/3•Headwind. The pilot can modify this computed value. Clearing the field reverts it to the computed speed.
FINAL: Selected landing runway is shown. The pilot cannot modify it through this field.
MDA: Minimum descent altitude can be entered here. If DH is entered in 3R, the field is blanked.
DH: Decision height can be entered here. If MDA is entered in 2R, the field is blanked.
LDG CONF: Two fields at 4R and 5R list possible landing flaps configurations, CONF 3 and FULL. Selected configuration is shown in large font, and second configuration is in small font. Select desired configuration by pressing corresponding LSK.
The center column shows computed flap retraction, slat retraction, green dot speed, and Vls.
A330 / A340
Systems Manual
P 59 REV 01 SEQ 001
MCDU
2L 1L
3L 4L 5L 6L
2R 1R
3R 4R 5R 6R
PERF GO AROUND page
THR RED/ACC: Thrust reduction and acceleration altitude. At thrust reduction altitude, the pilot retards thrust levers and thrust is reduced from TO to CLB. At acceleration altitude the SRS pitch mode is replaced by CLB mode, and speed target changes from V2+10 to climb speed. Both altitudes default to field elevation plus 1500 feet.
ENG OUT ACC: Engine out acceleration altitude.
5L
5R
The center column shows computed Flap retraction, Slat retraction, and Green Dot speed.