A320机组操作手册FLIGHT CREW OPERATING MANUAL 7(76)

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2. Apply the first correction :
He􀀃sgd􀀃ekdwhakd􀀃sdlodq􀁄stqd􀀃hr􀀃kdrr􀀃sg􀁄m􀀃nq􀀃dpt􀁄k􀀃sn􀀃SULB􀀃􀀋khmd􀀃2(+􀀃􀁄ookx􀀃ΔSekdw􀀃bnqqdbshnm􀀃eqnl􀀃khmd􀀃0
􀁄mc􀀃􀁄ookx􀀃roddc􀀃bnqqdbshnmr􀀃􀀋ΔU0.ΔUQ.ΔU1(􀀃eqnl􀀃khmd􀀃1􀀑
Dkrd+􀀃􀀋ekdwhakd􀀃sdlodq􀁄stqd􀀃fqd􀁄sdq􀀃sg􀁄m􀀃SULB(+􀀃􀁄ookx􀀃ΔSekdw􀀃eqnl􀀃khmd􀀃2􀀃􀁄mc􀀃ΔU0.􀀃ΔUQ.􀀃ΔU1
corrections from line 4.
Check V2 against VMU limitation (Refer to PER-TOF-TOD-25 MINIMUM V2 LIMITED BY
VMU/VMCA (KT IAS)). If V2 is lower than V2 limited by VMU, flexible takeoff is not possible. Set
TOGA thrust and retain the speeds associated with maximum permissible takeoff weight or the
speeds read in the chart for the actual weight if they are all lower.
No speed correction is required for QNH and bleeds influence (Not applicable to maximum takeoff
weight determination).
3. To combine a second and/or a third correction, proceed as per point 2.
4. Check that the final flexible temperature is :
‐ higher than OAT and TREF
‐ limited to TMAXFLEX
If the check is fulfilled, retain final flexible temperature as the one to be inserted in the MCDU.
If the check is not fulfilled, (final flexible temperature lower than OAT or TREF), no flexible
takeoff is possible.
Use TOGA thrust and retain speeds that have been calculated for the maximum permissible
takeoff weight. (Refer to PER-TOF-TOC-20-60 FLEXIBLE TAKEOFF NOT POSSIBLE)
Note: ‐ QNH correction is given for ± 10 hPa. It is allowed to extrapolate linearly for greater QNH
deviation.
‐ Corrections from the chart must be applied from top to bottom, i.e. in the RTOW on Refer
to PER-TOF-TOC-16-30 RTOW EXAMPLE, apply the wet influence first.
When the flexible temperature is higher than ‐ TVMC, it is allowed to limit the flexible
temperature to TVMC and apply only corrections from lines 1 and 2.
‐ If asterisk or dotted lines appear in the correction boxes, refer to more conservative
corrections provided in the FCOM.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
PERFORMANCE
TAKEOFF
TAKEOFF CHARTS - FLEXIBLE TAKEOFF (WEIGHT ENTRY)
A318/A319/A320/A321 FLEET PER-TOF-TOC-20-50 P 13/14
FCOM 19 AUG 10
EXAMPLE E
DATA : Actual takeoff weight = 68 000 kg
Head wind = 10 kt
QNH = 998 hPa
WET runway
Air conditioning OFF
Use the chart from Refer to PER-TOF-TOC-16-30 RTOW EXAMPLE. Determine the maximum
permissible takeoff weight (Refer to PER-TOF-TOC-18-10 CORRECTIONS PRODUCED ON
THE RTOW CHART). The actual weight being lower than the maximum one, flexible takeoff is
possible.
Enter the 10 kt head wind column and interpolate for 68 000 kg, CONF 1+F,
Flexible temperature.............................................................................................................. 67 °C
Enter the 10 kt head wind column and interpolate for 68 000 kg, CONF 2,
Flexible temperature.............................................................................................................. 66 °C
Retain CONF 1+F as the flexible temperature is higher.
Takeoff speeds are V1 = 153 kt, VR = 153 kt, V2 = 154 kt
Apply WET correction
Enq􀀃ekdwhakd􀀃sdlodq􀁄stqd􀀃􀀟􀀃SULB􀀃􀀋58􀀃°B(+􀀃ΔSekdw􀀃<􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑􀀑-2 °C
Intermediate flex temperature....................................................................................................65 °C
Associated speeds,
V1 = 153 kt – 8 = 145 kt
VR = 153 kt – 2 = 151 kt
V2 = 154 kt – 2 = 152 kt
Check V2 against VMU limitation in Refer to PER-TOF-TOD-25 MINIMUM V2 LIMITED BY
VMU/VMCA (KT IAS).
　
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