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Repeat the above process for the other available configuration and retain the configuration giving
the highest takeoff weight.
CORRECTIONS DUE TO DIFFERENT TAKEOFF CONDITIONS
Applicable to: ALL
Retain the maximum takeoff weight, associated configuration and speeds from above.
For conditions different from those of the chart, apply relevant corrections.
CONSERVATIVE CORRECTIONS FOR QNH AND BLEEDS
Applicable to:
Refer to PER-TOF-TOD-24 EFFECT OF QNH AND BLEEDS
Corrections􀀃are􀀃given􀀃for􀀃QNH􀀃≠􀀃1􀀃013􀀃hPa,􀀃air􀀃conditioning􀀃ON,􀀃anti􀀃ice􀀃ON.􀀃
1. For the given wind and temperature conditions, determine the maximum takeoff weight (choose
the configuration giving the highest weight).
2. Apply the published weight correction(s) to the maximum takeoff weight (for each correction) to
determine the maximum permissible takeoff weight.
3. Read the speeds associated with the maximum permissible takeoff weight by entering the chart
with the retained configuration and weight value.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - MTOW CALCULATION (WEIGHT ENTRY)
A330/A340 FLEET PER-TOF-TOC-18-10 P 3/12
FCOM 19 AUG 10
EXAMPLE A
DATA: OAT = 25 °C
Head Wind = 10 kt
Air conditioning ON
QNH = 1 013 hPa
Use the chart (Refer to PER-TOF-TOC-16-30 CHART LAYOUT).
Enter the 10 kt head wind column, CONF 1+F, to read for 25 °C
The lowest temperature of the column is 34 °C, use Grad 1/Grad 2 to extrapolate the maximum
takeoff weight.
Max TO weight (1 000 kg) air conditioning OFF = 270.3+1.65 × 4+0.160 × 5 = 277.7
Enter the 10 kt head wind column, CONF 2, to read for 25 °C
The lowest temperature of the column is 32 °C, use Grad 1/Grad 2 to extrapolate the maximum
takeoff weight.
Max TO weight (1 000 kg) air conditioning OFF = 272.0+1.64 × 2+0.140 × 5 = 276.0
Retain CONF 1 + F as takeoff configuration.
Maximum TO weight (1 000 kg) air conditioning OFF...........................................................277.7
Air conditioning correction .................................................................................................... -17.5
Refer to PER-TOF-TOD-24 EFFECT OF QNH AND BLEEDS
Maximum permissible TO weight (1 000 kg) air conditioning ON.......................................= 260.2
Read takeoff speeds for 260.2 (1 000 kg) in the 10 kt head wind column (CONF1+F)
V1 = 152 kt, VR = 161 kt, V2 = 167 kt
CONSERVATIVE CORRECTIONS FOR QNH AND BLEEDS
Applicable to: ,
Refer to PER-TOF-TOD-24 EFFECT OF QNH AND BLEEDS
Corrections􀀃are􀀃given􀀃for􀀃QNH􀀃≠􀀃1􀀃013􀀃hPa,􀀃air􀀃conditioning􀀃ON,􀀃anti􀀃ice􀀃ON.􀀃
1. For the given wind and temperature conditions, determine the maximum takeoff weight (choose
the configuration giving the highest weight).
2. Apply the published weight correction(s) to the maximum takeoff weight (for each correction) to
determine the maximum permissible takeoff weight.
3. Read the speeds associated with the maximum permissible takeoff weight by entering the chart
with the retained configuration and weight value.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - MTOW CALCULATION (WEIGHT ENTRY)
A330/A340 FLEET PER-TOF-TOC-18-10 P 4/12
FCOM 19 AUG 10
EXAMPLE A
DATA: OAT = 25 °C
Head Wind = 10 kt
Air conditioning ON
QNH = 1 013 hPa
Use the chart (Refer to PER-TOF-TOC-16-30 CHART LAYOUT).
Enter the 10 kt head wind column, CONF 1+F, to read for 25 °C
The lowest temperature of the column is 31 °C, use Grad 1/Grad 2 to extrapolate the maximum
takeoff weight.
Max TO weight (1 000 kg) air conditioning OFF = 220.2+1.010 × 2+0.160 × 4 = 222.9
Enter the 10 kt head wind column, CONF 2, to read for 25 °C
The lowest temperature of the column is 30 °C, use Grad 1/Grad 2 to extrapolate the maximum
takeoff weight.
Max TO weight (1 000 kg) air conditioning OFF = 220.5+1.040 × 1+0.140 × 4 = 222.1
Retain CONF 1 + F as takeoff configuration.
Maximum TO weight (1 000 kg) air conditioning OFF...........................................................222.9
Air conditioning correction ...................................................................................................... -3.8
Refer to PER-TOF-TOD-24 EFFECT OF QNH AND BLEEDS
Maximum permissible TO weight (1 000 kg) air conditioning ON.......................................= 219.1
　
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