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• Apply QNH correction
For􀀃OAT􀀃<􀀃TVMC􀀃(54􀀃°),􀀃ΔW􀀃=􀀃-􀀃2.7􀀃×􀀃15/10􀀃=......................................................................-􀀃4.1􀀃
Maximum permissible takeoff weight (1 000 kg)................................................................... 263.9
Associated speeds,
V1 = 149 kt - 1 × 15/10 = 147 kt
VR = 162 kt - 1 × 15/10 = 161 kt
V2 = 168 kt - 1 × 15/10 = 167 kt
• Check that the speeds are higher than minimum speeds from the chart and from VMU table.
Takeoff Configuration : 1 + F
TOWV1 VR V2
TOW(RTOW) 268.1 151 162 168
FCOM correction(s)
Intermediate value 268.1 151 162 168
WET Correction - 0.1 -2 0 0
Intermediate value 268.0 149 162 168
QNH Correction - 4.1 -2 -1 -1
Final value 263.9 147 161 167
CORRECTIONS PRODUCED ON THE RTOW CHART
Applicable to: ,
For example : Refer to PER-TOF-TOC-16-30 CHART LAYOUT.
Description of this correction : Refer to PER-TOF-TOC-16-20 DESCRIPTION OF THE
CORRECTIONS ON TAKEOFF CHART. The list of corrections is not exhaustive, however the most
commonly used corrections are wet runway, QNH, air conditioning and/or anti ice. A maximum of
three corrections can be produced on one chart.
To apply the corrections, proceed as follows :
1. Determine the maximum takeoff weight before correction for the given OAT and wind condition.
2. Apply the first correction :
If􀀃OAT􀀃is􀀃less􀀃than􀀃or􀀃equal􀀃to􀀃TVMC􀀃(line􀀃3),􀀃apply􀀃ΔW􀀃correction􀀃from􀀃line􀀃1􀀃and􀀃ΔV1/ΔVR/ΔV2􀀃
corrections from line 2.
A330/A340 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - MTOW CALCULATION (WEIGHT ENTRY)
A330/A340 FLEET PER-TOF-TOC-18-10 P 7/12
FCOM 19 AUG 10
Else,􀀃(for􀀃OAT􀀃greater􀀃than􀀃TVMC),􀀃apply􀀃ΔW􀀃correction􀀃from􀀃line􀀃3􀀃and􀀃ΔV1/ΔVR/ΔV2􀀃corrections􀀃
from line 4.
3. To combine a second (and third, as applicable) correction :
If􀀃OAT􀀃is􀀃less􀀃than􀀃or􀀃equal􀀃to􀀃TVMC􀀃(line􀀃3),􀀃apply􀀃ΔW􀀃correction􀀃from􀀃line􀀃1􀀃and􀀃ΔV1/ΔVR/ΔV2􀀃
corrections from line 2.
Check that the resulting speeds are higher than the minimum speeds displayed on the RTOW
chart and that V2 is higher than the VMU limited speed (Refer to PER-TOF-TOD-25-20
GENERAL).
If􀀃OAT􀀃is􀀃higher􀀃than􀀃TVMC􀀃(line3)􀀃or􀀃if􀀃the􀀃above􀀃speed􀀃check􀀃is􀀃not􀀃fulfilled,􀀃apply􀀃ΔW􀀃correction􀀃
from􀀃line􀀃3􀀃and􀀃ΔV1/ΔVR/ΔV2􀀃corrections􀀃from􀀃line􀀃4.􀀃No􀀃speed􀀃check􀀃is􀀃required.􀀃
Note: QNH correction is given for ± 10 hPa. It is allowed to extrapolate ‐ linearly for greater QNH
deviation.
‐ When using a takeoff chart with failure cases, it is not allowed to combine two failure
cases.
‐ Corrections from the chart must be applied from top to bottom, i.e. in the RTOW on Refer
to PER-TOF-TOC-16-30 CHART LAYOUT, apply the wet correction first.
‐ If asterisk or dotted lines appear in the correction boxes, refer to more conservative
corrections provided in the FCOM.
‐ No speed check is required for the first correction. However, if the first influence
correction follows a conservative FCOM correction, a speed check is required.
EXAMPLE B
DATA : OAT = 35 °C
Head wind = 10 kt
QNH = 998 hPa
WET runway
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 35 °C
max TO weight (1 000 kg).....................................................................................................215.1
• Enter the 10 kt head wind column, CONF 2, to read for 35 °C
max TO weight (1 000 kg).....................................................................................................214.0
• Retain CONF 1 + F for takeoff.
• Read associated speeds as V1 = 150 kt, VR = 151 kt, V2 = 156 kt
A330/A340 FLIGHT CREW
　
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