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Engine anti ice correction : none
The maximum permissible takeoff weight is 70 000 + 320 = 70 320 kg
EXAMPLE 2 - FLEXIBLE THRUST TAKEOFF
Actual data : OAT = 5 °C
QNH = 1 040 hPa
Anti ice OFF
Air conditioning ON
TOW = 65 000 kg
Flexible temperature read in the takeoff chart : TFLEX = 55 °C.
Read TREF on the takeoff chart or on the quick reference table.
Determine the actual airport pressure altitude (1 hPa is equivalent to 28 ft according to the ISA
model).
Pressure altitude = 450 - (1 040 - 1 013) × 28 = - 306 ft
Read in the above table the correction for QNH and air conditioning ON :
QNH correction = 1 °C/50 hPa × (450/28) = 0 °C
Air conditioning ON correction : -3 °C
New flexible temperature = 55 + 0 - 3 = 52 °C
Check that the flexible temperature is above TREF and actual OAT.
Check that he flexible temperature is less than the maximum flexible temperature and retain the
lower of the two.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF DATA - QNH/BLEEDS CORRECTION
A318/A319/A320/A321 FLEET PER-TOF-TOD-24 P 14/16
FCOM 19 AUG 10
EXAMPLES
Applicable to:
TAKEOFF CHART DATA
Airport geometric elevation = 450 ft
QNH = 1 013 hPa
Anti ice OFF
Air conditioning OFF
EXAMPLE 1 - FULL THRUST TAKEOFF
Actual data : OAT = 5 °C
QNH = 1 040 hPa
Engine anti ice ON
Air conditioning OFF
Weight read in the takeoff chart : 70 000 kg
Determine the actual airport pressure altitude (1 hPa is equivalent to 28 ft according to the ISA
model).
Pressure altitude = 450 - (1 040 - 1 013) × 28 = - 306 ft
Read in the above table the corrections for high QNH and engine anti ice ON.
QNH correction = 20 kg × (450/28) + 0 kg × (306/28) = + 320 kg
Engine anti ice correction : - 250 kg
The maximum permissible takeoff weight is 70 000 + 320 - 250 = 70 070 kg
EXAMPLE 2 - FLEXIBLE THRUST TAKEOFF
Actual data : OAT = 5 °C
QNH = 1 040 hPa
Anti ice OFF
Air conditioning ON
TOW = 65 000 kg
Flexible temperature read in the takeoff chart : TFLEX = 55 °C.
Read TREF on the takeoff chart or on the quick reference table.
Determine the actual airport pressure altitude (1 hPa is equivalent to 28 ft according to the ISA
model).
Pressure altitude = 450 - (1 040 - 1 013) × 28 = - 306 ft
Read in the above table the correction for QNH and air conditioning ON :
QNH correction = 1 °C/40 hPa × (450/28) + 0 = 0 °C
Air conditioning ON correction : -4 °C
New flexible temperature = 55 + 0 - 4 = 51 °C
Check that the flexible temperature is above TREF and actual OAT.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF DATA - QNH/BLEEDS CORRECTION
A318/A319/A320/A321 FLEET PER-TOF-TOD-24 P 15/16
FCOM 19 AUG 10
Check that he flexible temperature is less than the maximum flexible temperature and retain the
lower of the two.
EXAMPLES
Applicable to: ,
, MSN
TAKEOFF CHART DATA
Airport geometric elevation = 450 ft
QNH = 1 013 hPa
Anti ice OFF
Air conditioning OFF
EXAMPLE 1 - FULL THRUST TAKEOFF
Actual data : OAT = 5 °C
QNH = 1 040 hPa
Engine anti ice ON
Air conditioning OFF
Weight read in the takeoff chart : 85 000 kg
Determine the actual airport pressure altitude (1 hPa is equivalent to 28 ft according to the ISA
model).
Pressure altitude = 450 - (1 040 - 1 013) × 28 = - 306 ft
Read in the above table the corrections for high QNH and engine anti ice ON.
QNH correction = 50 kg × (450/28) + 10 kg × (306/28) = + 910 kg
Engine anti ice correction : - 400 kg
The maximum permissible takeoff weight is 85 000 + 910 - 400 = 85 510 kg
EXAMPLE 2 - FLEXIBLE THRUST TAKEOFF
Actual data : OAT = 5 °C
QNH = 1 040 hPa
Anti ice OFF
Air conditioning ON
TOW = 75 000 kg
Flexible temperature read in the takeoff chart : TFLEX = 55 °C.
Read TREF on the takeoff chart or on the quick reference table.
Determine the actual airport pressure altitude (1 hPa is equivalent to 28 ft according to the ISA
model).
Pressure altitude = 450 - (1 040 - 1 013) × 28 = - 306 ft
Read in the above table the correction for QNH and air conditioning ON :
QNH correction = 1 °C/20 hPa × (450/28) + 0 = 0 °C
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF DATA - QNH/BLEEDS CORRECTION
A318/A319/A320/A321 FLEET PER-TOF-TOD-24 P 16/16
FCOM 19 AUG 10
Air conditioning ON correction : -5 °C
　
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