MULTIPHASE
6
VERTICAL F-PLN management
SPD CSTR [3L]
SPD CSTR at a WPT is displayed in [3L]
on VERT REV page, selected at the
associated WPT (revise point).
When entered, in CAS only, SPD CSTR
becomes the upper limit for the
applicable flight segment, according to
phase as below:
VERT REV
AT
TOU
EFOB=
7.1
EXTRA=
1.3
CLB SPD LIM UTC CSTR
250/FL100
[ ]
SPD CSTR ALT CSTR
[ ]
[ ]
ACCESS
<WIND DATA STEP ALTS>
<RETURN
CLR
−
A "climb" SPD CSTR applies from
origin up to revise point (or to T/C if
the revise point is beyond T/C),
−
A "descent" SPD CSTR applies from the revise point down to DEST
(or T/D if T/D is beyond the revise point).
Speed constraints are not applied in Cruise or Approach phases.
A missed approach speed constraint may be entered to be respected
from DEST up to the revise point belonging in the GA procedure (i.e., it
is similar to a "climb" constraint).
When defaulted by NAV data base SPD CSTR value is displayed in small
font; in large font when pilot-entered.
A speed constraint on a HM may only be entered via the NAV data base
and cannot be modified by pilot. This speed constraint is used only for
computation of holding target speed.
A SPD CSTR is considered as matched if the predicted speed error is
10 KT or less (shown by
*
symbol magenta). Otherwise it is
considered missed (shown by
*
symbol amber); it remains missed
until error decreases to 5 KT.
If SPD CSTR is predicted as missed, "SPEED ERROR AT XXXXX" (WPT
ident) s-pad msg is displayed, when:
−
Airborne and NAV mode engaged, and
−
In CLB if missed constraint is "climb" or CRZ/DES within 150 NM of
DEST if missed constraint is "descent".
SPD LIMIT EXCEEDED
This s-pad msg (white) is displayed in CLIMB, CRUISE and DESCENT
flight phases when:
−
Speed exceeds SPEED LIMIT by 10 KT, and
−
ALT is within 150 ft of SPEED LIMIT ALTITUDE.
Message is cleared when speed no longer exceeds the SPEED LIMIT +
5 KT.
See also Part II: Ch 4 Climb for example.
J43126AA 00
© THALES AVIONICS S.A.
AIRBUS A318/319/320/321
Summary of Contents for FMGS
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