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• Sea level atmospheric pressure (QNH) at destination
• Surface temperature (TEMP) at destination
• Temperature in cruise phase
• The Tropopause altitude (TROPO).
‐ Tactical data for the flight phases:
• Phase switching conditions:
▪ Setting of the thrust levers to TOGA or FLEX positions
▪ Reaching acceleration altitude (ACCEL ALT)
▪ Entering cruise (T/C)
▪ Initiation of descent (T/D)
▪ Passing a deceleration pseudo waypoint (DECEL PSEUDO WPT)
▪ Touchdown.
• Speed profile:
▪ V2
▪ Economy climb speed or Mach (ECON CLB SPD/MACH)
▪ Preselected speed or Mach (SPD/MACH PRESELECTION)
▪ Economy cruise Mach (ECON CRZ MACH)
▪ Economy descent Mach or speed (ECON DES MACH/SPD)
▪ Approach speed (VAPP).
• Vertical limitations:
▪ Speed limits (SPD LIMIT)
▪ Speed and altitude constraints (SPD AND ALT CSTR)
▪ Time constraints �� .
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-05 P 3/12
FCOM 19 AUG 10
In addition to the data entered by the flight crew, the FMS uses some real flight data parameters
(CRZ SAT, actual wind) to improve the accuracy of the computed predictions.
VERTICAL FLIGHT PLANNING
Applicable to:
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DATA ENTRY
The vertical flight plan provides the FMGS with all the data required to calculate performance and
predictions. This data is either entered by the flight crew or calculated by the FMS.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-05 P 4/12
FCOM 19 AUG 10
There are three categories of data:
‐ Strategic data, that applies to the overall flight profile:
• Cost Index (CI)
• Cruise Flight Level (CRZ FL) and STEP ALTS if any
• Zero-Fuel Weight (ZFW)
• Zero-Fuel Weight Center of Gravity (ZFWCG)
• Block Fuel.
‐ Weather data:
• Winds (for climb, cruise, descent, approach)
• Sea level atmospheric pressure (QNH) at destination
• Surface temperature (TEMP) at destination
• Temperature in cruise phase
• The Tropopause altitude (TROPO).
‐ Tactical data for the flight phases:
• Phase switching conditions:
▪ Setting of the thrust levers to TOGA or FLEX positions
▪ Reaching acceleration altitude (ACCEL ALT)
▪ Entering cruise (T/C)
▪ Initiation of descent (T/D)
▪ Passing a deceleration pseudo waypoint (DECEL PSEUDO WPT)
▪ Touchdown.
• Speed profile:
▪ V2
▪ Economy climb speed or Mach (ECON CLB SPD/MACH)
▪ Preselected speed or Mach (SPD/MACH PRESELECTION)
▪ Economy cruise Mach (ECON CRZ MACH)
▪ Constant Mach
▪ Economy descent Mach or speed (ECON DES MACH/SPD)
▪ Approach speed (VAPP).
• Vertical limitations:
▪ Speed limits (SPD LIMIT)
▪ Speed and altitude constraints (SPD AND ALT CSTR)
▪ Time constraints or Required Time of Arrival (RTA).
In addition to the data entered by the flight crew, the FMS uses some real flight data parameters
(CRZ SAT, actual wind) to improve the accuracy of the computed predictions.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - FLIGHT MANAGEMENT
FLIGHT PLANNING - VERTICAL FUNCTIONS
A318/A319/A320/A321 FLEET DSC-22_20-30-20-05 P 5/12
FCOM 19 AUG 10
FLIGHT PHASES
Applicable to:
The vertical flight plan is divided into flight phases. For each phase, the FMGS computes the
optimum speed or Mach Profile. These flight phases are:
Preflight - Takeoff - Climb - Cruise - Descent - Approach - Go-Around - Done.
FLIGHT PHASES OPTIMUM SPEED PROFILE SWITCHING CONDITIONS TO NEXT PHASE
PREFLIGHT / SRS takeoff mode engaged and N1 > 85 %
(EPR ≥ 1.25) or Ground Speed >90 kt
TAKEOFF V2
(V2 + 10)
At acceleration altitude or by engagement of
another vertical mode.
CLIMB ECON CLB SPD / MACH Reaching cruise FL
CRUISE ECON CRZ MACH No step descent, and distance to destination <
200 nm
DESCENT ECON DES MACH / SPD Overflying (DECEL) ‐ pseudo waypoint with
NAV (or LOC*/LOC) mode engaged and
altitude <7 200 ft AGL
‐ Manual activation of the approach phase.
APPROACH VAPP
(GS Min)
1. To Go-Around: When thrust levers at TOGA
　
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