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2. The flight level shown on the top of each column is the final flight level.
3. For each degree celsius above ISA apply a fuel correction of
0.005 (kg/°C/NM) × ◂ISA (°C) × Air Distance (NM)
or 0.011 (lb/°C/NM) × ◂ISA (°C) × Air Distance (NM)
GENERAL
Applicable to:
The following in cruise quick check tables allow the flight crew to determine the fuel consumption and
the time required to cover a given air distance from any moment in cruise to land.
These tables are established for :
‐ Cruise Mach number : M .78/LR
‐ Descent profile : M .78/300 kt/250 kt
‐ Approach and landing : 110 kg or 240 lb -6 min IMC
‐ ISA
‐ CG = 33 %
‐ Normal air conditioning
‐ Anti ice OFF
Note: 1. In the tables, the asterisk “*” means that a step climb of 4 000 ft has been made to reach
the corresponding flight level.
2. The flight level shown on the top of each column is the final flight level.
3. For each degree celsius above ISA apply a fuel correction of
0.005 (kg/°C/NM) × ◂ISA (°C) × Air Distance (NM)
or 0.011 (lb/°C/NM) × ◂ISA (°C) × Air Distance (NM)
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
CRUISE
ALL ENGINES OPERATIVE - IN CRUISE QUICK CHECK
A318/A319/A320/A321 FLEET PER-CRZ-AEO-ICQ-20 P 1/2
FCOM 19 AUG 10
CORRECTION FOR DEVIATION FROM REFERENCE WEIGHT
CORRECTION FOR DEVIATION FROM REFERENCE WEIGHT
Applicable to: ALL
The in cruise quick check tables are based on a reference initial weight.
The fuel consumption must be corrected when the actual weight is different from the reference initial
weight.
If it is lower (or greater) than the reference weight, subtract (or add) the value given in the correction
part of the table per 1 000 kg or 1 000 lb below (or above) the reference weight.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
CRUISE
ALL ENGINES OPERATIVE - IN CRUISE QUICK CHECK
Intentionally left blank
A318/A319/A320/A321 FLEET PER-CRZ-AEO-ICQ-20 P 2/2
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
CRUISE
ALL ENGINES OPERATIVE - IN CRUISE QUICK CHECK
A318/A319/A320/A321 FLEET PER-CRZ-AEO-ICQ-30 P 1/6
FCOM 19 AUG 10
EXAMPLE
EXAMPLE
Applicable to:
In-cruise quick check with cruise at M .78
FL 370
Actual cruise weight : 55 000 kg
Remaining ground distance : 800 nm
ISA +10
Average wind during flight : -40 kt (head wind)
Evaluation ‐ of air distance to be covered
• Using the “Ground Distance/Air Distance” conversion table (Refer to PER-OPD-CON-AEO
M.78), the corresponding air distance is : 880 nm
‐ Determination of the fuel consumption and time for the reference initial weight in cruise.
• Enter table (03.05.20.p3) with an air distance of 880 nm and FL 370 for ISA.
Fuel consumption : 3 983 kg
Time needed : 2 h 08 min
‐ Correction due to real in cruise weight of 55 000 kg
◂ fuel consumption : -46 kg per 1 000 kg below reference
◂ fuel : -46 × (60 - 55) = - 230 kg
‐ Temperature correction :
◂ fuel consumption : +0.005 kg per 1 °above ISA and per 1 nm Air distance
◂ fuel : +0.005 × 10 × 880 = 44 kg
RESULT
Fuel : 3 983 - 230 + 44 = 3 797 kg
Time : 2 h 08 min
EXAMPLE
Applicable to:
In-cruise quick check with cruise at M .78
FL 370
Actual cruise weight : 55 000 kg
Remaining ground distance : 800 nm
ISA +10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
CRUISE
ALL ENGINES OPERATIVE - IN CRUISE QUICK CHECK
A318/A319/A320/A321 FLEET PER-CRZ-AEO-ICQ-30 P 2/6
FCOM 19 AUG 10
Average wind during flight : -40 kt (head wind)
‐ Evaluation of air distance to be covered
• Using the “Ground Distance/Air Distance” conversion table (Refer to PER-OPD-CON-AEO
M.78), the corresponding air distance is : 880 nm
‐ Determination of the fuel consumption and time for the reference initial weight in cruise.
• Enter table (Refer to PER-CRZ-AEO-ICQ-40 IN CRUISE QUICK CHECK M.78) with an air
distance of 880 nm and FL 370 for ISA.
Fuel consumption : 3 983 kg
Time needed : 2 h 07 min
‐ Correction due to real in cruise weight of 55 000 kg
◂ fuel consumption : -41 kg per 1 000 kg below reference
◂ fuel : -41 × (60 - 55) = - 205 kg
‐ Temperature correction :
◂ fuel consumption : +0.005 kg per 1 °above ISA and per 1 nm Air distance
◂ fuel : +0.005 × 10 × 880 = 44 kg
　
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