Thales FMGS, Pilot'S Manual

Page: 409 / 703

MULTIPHASE
VERTICAL F-PLN management 21
To delete ALT CSTRs
All ALT CSTRs, except those manually entered at a WPT in a precision
approach procedure between FAF and RWY (see below), may be
manually deleted by using CLR function at [3R] on VERT REV page.
Any previously existing data-base defaulted values are not recovered.
If a FPA is defined at a WPT (as at FAF in an approach procedure),
deletion of the ALT CSTR at that WPT also deletes the FPA.
Automatic deletion:
ALT CSTRs are automatically deleted when:
− The associated WPT is deleted by CLR or by DIR TO functions.
(CSTRs are not transferred to ABM points when this function is
used).
− A GO-AROUND is initiated before DEST RWY sequenced, and
conditions for re-stringing approach are met. In this case CSTRs up
to DEST are deleted; "CSTR DEL UP TO XXXXX" s-pad msg (white) is
displayed.
− ALTN F-PLN is enabled; CSTRs up to original DEST, and all climb
CSTRs of ALTN F-PLN below actual altitude, are deleted.
Same s-pad msg as above is displayed.
Note
ALT CSTRs may also be revised directly on F-PLN page A by right LSK
at revise point preceded:
− Use "/" (e.g. /80, /+80) format for insertion,
− Use CLR function for deletion. In this case it will delete all vertical
constraints.
As already explained this method is not recommended due to
possible error insertion in case of simultaneous leg switching.
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
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