AUTOFLIGHT, CAT I
Description
Aircraft Operations Manual
3.1
S
PAGE
5
Jun 01/19
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NAV mode is cleared by selecting HDG or APPR.
1/2 BANK, Half bank mode (If installed)
−
The Half bank mode is a submode to HDG and
NAV. It reduces the bank limit from 27
to 13.5
in these modes.
−
Mode is selectable by pushing the 1/2 BANK but-
ton, and indicated on the MSP only; it has no
mode annunciator on the EADI. Mode is turned
off by a second push on the button.
−
The mode is suppressed at APPR LOC/VOR
capture.
COMBINED MODES
APPR, Approach mode
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The FCC functions in principle as in NAV mode
but commands are also given for vertical capture/
tracking if an ILS GS is available. Radio altimeter
information is used to gainprogram the radio sig-
nals for increased precision during the approach.
−
Mode is armed by pushing the APPR button.
FCC automatically reverts to HDG and desired
intercept heading can be selected on the heading
bug.
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Mode is engaged at the respective capture point
and the LOC/VOR ”CAP” and GS ”CAP” informa-
tion are displayed on EADI.
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FD display can not be removed by pushing FD
buttons on DCP.
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The following types of approaches are possible:
a. ILS: localizer capture is indicated by EADI lateral
mode annunciation changes to LOC ”CAP”, GS
”ARM” is displayed for the vertical axis. GS shall
be captured from below the beam.
In GS ”CAP” a new vertical mode can only be
selected after a new lateral mode has been
selected (other than APPR).
b. BC, Back Course: The Back Course is automati-
cally corrected for by EFIS and annunciated by a
yellow B/C replacing the GS ”CAP” indication on
the EADI/EHSI.
With the CRS selector set for the normal
Localizer inbound course the LOC symbols on
the EADI/EHSI are not reversed when flying:
−
Inbound on the Back course.
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Outbound on the Localizer inbound course.
BC approach operates like LOC, except for
slightly different gains.
Vertical profile has to be flown by pilot inputs.
c. VOR: Operation is similar to NAV except tighter
gains, VOR ”CAP” or ”ARM” are displayed.
Vertical profile has to be flown by pilot inputs.
GA, Go
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Around mode
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The FCC commands existing heading hold and a
fixed pitch up attitude (6,4
) on the FD.
If the aircraft is in altitude preselect or track cap-
ture (ALTS “CAP” and ALTS “TRACK”), these
modes might be immediately recaptured and the
resulting FD command will not indicate a climb.
NOTE
−
Mode can be selected at any time by pressing
either GA button in the power levers. GA is dis-
played on the lateral and vertical mode annunci-
ations on EADI. Since GA is a FD mode only, the
AP and YD will disengage.
−
Selection of GA clears any previously selected
lateral and vertical mode (ALTS “CAP” and ALTS
“TRACK” might however be immediately recap-
tured if these modes were captured when GA
was selected).
−
At re
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engagement of the AP, the FCC remains in
GA mode in the lateral axis while the vertical
mode will become VS.
The heading bug will not be synchronized at GA
selection, but the existing heading at GA initiation
will be maintained until another lateral mode is se-
lected.
MAINTENANCE
Diagnostic mode
−
Provides a multiple line display on EFIS to assist
in failure analysis.
−
Report mode is the one of the three available
basic submodes that is to be notified here.
−
Available on ground only with AP and YD disen-
gaged but before power shutdown.