FLIGHT PHASES
22 CRUISE
PERF key...........................Press
PERF CRZ page is displayed
DES CABIN RATE [5R]
This field is modifiable and defaulted to
– 350 ft/mn.
(-) may be omitted.
If modified, to return to default value
use CLR key.
CRZ
ACT MODE UTC DEST EFOB
MANAGED 2309 3.9
CI
30 TO (T/D)
MANAGED UTC DIST
.79 2247 55
DES CABIN RATE
-350FT/MN
ACTIVATE NEXT
{APPR PHASE PHASE>
Re-pressurization segment
T/D is computed for optimized descent
at idle thrust.
FMGC calculates the descent cabin rate
with:
− Difference between Cabin Alt (Zc) a
DEST airport Alt (Zt, corrected by
QNH),
nd
− Time from T/D to DEST.
If the result is below –350 ft/mn, no
change is made.
If a greater rate is calculated, T/D is
adjusted backwards and a re-
pressurization segment is added in
order to maintain the selected cabin
rate.
Pilot is advised by "CABIN RATE EXCEEDED" s-pad msg (white), which
is displayed when:
CRZ
ACT MODE UTC DEST EFOB
MANAGED 1751 3.9
CI
30 TO (T/D)
MANAGED UTC DIST
.79 1728 108
DES CABIN RATE
-200FT/MN
ACTIVATE NEXT
{APPR PHASE PHASE>
− In CRZ flight phase, and,
− Within 200NM of the destination (along the F-PLN), and,
− Cabin rate of computed descent profile exceeds the maximum cabin
rate.
Slope of the re-pressurization segment is 4 x cabin rate.
ime (T)
DEST Altitude (Zt)
CABIN Altitude (Zc)
Re-pressurization segment
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
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