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IR - Heading Information Display on the PFD
Figure 011
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IR - Heading Information Display on the ND
Figure 012
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3_ ARC mode (item B)
In this mode, the ND displays a 90 deg. heading sector ahead
of the aircraft giving the aircraft actual magnetic or true
heading with respect to the fixed yellow lubber line at the
top of the scale.
4_ PLAN mode
The ND displays a static map orientated with respect to the
true North.
5_ Heading failure (items C and D)
In case of heading failure, the scale and all symbols
positioned on the ROSE and ARC scales go out of view; a red
HDG flag comes into view below the scale after flashing for a
few seconds, when the DMC has detected an anomaly concerning
the heading parameter.
In addition, if a discrepancy between CAPT and F/O sides is
detected by the comparison inside the FWCs, the CHECK HDG
message is displayed in amber on both NDs (item E).
(c)
On the VOR/DME RMI (Ref. Fig. 013) The heading indication is given by a dial which rotates in front of a fixed index (item A). In case of heading failure, the fire orange warning flag with the black HDG inscription comes into view at the top of the compass card (item B). For more details ref. 34-57-00.
(d)
On the CDU The time heading can be displayed on the CDU if the DATA DISPLAY selector switch is placed in the HDG position.
(3) Ground speed (Ref. Fig. 014) The ground speed is displayed in the left upper corner of the ND for ROSE, ARC or PLAN mode (item A). The GS title is displayed in white color and the ground speed value in green. In case of failure or NCD, the ground speed value is replaced by three dashed lines (item B). The ground speed can also be displayed on the CDU if the DATA DISPLAY selector switch is placed in the TK/GS position.
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IR - Heading Information Display on the VOR/DME RMI
Figure 013
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IR - GS, Wind, vertical Speed Information Display
Figure 014
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(4)
Wind indications (Ref. Fig. 014) The wind origin, force and direction is displayed in the left upper corner of the ND, for ROSE, ARC and PLAN mode (item A):
-
the wind origin is displayed in green color in degrees with respect to the true North
-
the wind force is displayed in green color in knots
-
the wind direction, in analog form, is represented by means of a green arrow orientated with respect to the north reference in use. This arrow is displayed only if the wind force is greater than 2 knots. In case of failure or NCD, the digital data are replaced by three dashed lines and the wind direction arrow disappears (item B). The wind indications can also be displayed on the CDU if the DATA DISPLAY selector switch is placed in the WIND position.
(5)
Vertical speed (Ref. Fig. 014) The inertial vertical speed is displayed in the right side of the PFD (item C). The vertical speed scale consists of:
-
a trapezoidal grey background colored surface
-
a fixed white scale with 500 ft/mn spaced marks from -2000 ft/mn to +2000 ft/mn
-
a needle giving in analog form the actual vertical speed value
-
a number in a moving blanking window. This window accompanies the needle (above the needle if V/S > 0, below if V/S < 0). The number gives the V/S value in hundreds of ft/mn. Between -200 ft/mn and +200 ft/mn, both the window and the number disappear.
-above +6000 ft/mn (or below -6000 ft/mn), the needle remains
stopped where it is. When the vertical speed exceeds +6000 ft/mn or -6000 ft/mn, the digital indication and the analog needle change from green to amber. In addition, those indications change to amber in approach, in the following cases:
-
V/S less than -2000 ft/mn below 2500 ft RA.
-
V/S less than -1200 ft/mn below 1000 ft RA.
In case of failure, the inertial vertical speed display is
automatically replaced by the baro vertical speed display (Ref.
34-13-00).
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