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┃ FLIGHT CREW OPERATING MANUAL ┃ ┃ ┃ ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━━┻━━━━┻━━━━┛
lIE]
DES
ACT MODE UTC DEST EFOB
ECON 0844 7.4
cI
50
ECON
.79/322
PREV
<PHASE
.75/300
NEXT
PHASE>
DES
ACT MODE UTC DEST EFOB
AUTO SPD 0845 7.4
cI
50
AUTO SPD
.75/300
PREV
<PHASE
NEXT
PHASE>
R The pilot can revert to the optimum speed/Mach by clearing the field 3L
Optimum target Mach number in cruise
FM computes ECON CRZ MACH as the optimum speed and updates it continually, taking
into account :
- current weather conditions
- modifications to the flight plan
Note ~ Below FL 250 the FMGS calculates ECON CRZ SPD instead of ECON CRZ MACH
Optimum flight level in cruise
The optimum flight level is the flight level at which the aircraft incurs the lowest cost for
a given flight plan, cost index, and gross weight. FM updates it continuously during the
cruise phase, and displays it on the PROG page. The PROG page displays dashes for this
quantity :
- at least 15 NM before top of descent
- when the system detects an engine-out condition
- when DES phase is activated
PILOT
SELECTED
MACH
ECON
CRZ MACH
┏━━━━━━━━━━━━━━━━━━┓
┃ CRZ ┃
┃ ACT MODE UTC PEST EFOB ┃
┃ MACH.78 1215 8.4 ┃
┃ CI DES ┃
┃ 540 FORECAST> ┃
┃ ECON ┃
┃ ACTIVATE NEXT ┃
┃ ~APPR PHASE PHASE> ┃
┗━━━━━━━━━━━━━━━━━━┛
PERF CRZ PAGE
EE]m
F~F~
E~E]
DD
OPTIMUM
FL
┏━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ ~ DES ┃
┃ AF5612 ┃
┃ CRZ~ OPT REC MAX ┃
┃ FL350 FL390 ┃
┃ VDEV= + 39OFT ┃
┃ UPDATE AT ┃
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本文鏈接地址：
AIRBUS A320 Flight Crew Operating Manual2(9)
