-present position (PPOS)
-true heading (HDG)
-status of selected system conditions (STS)
-track and ground speed (TK/GS)
-test values (TEST).
The sources of the data displayed are controlled by the SYS DISPLAY
selector switch on the CDU.
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(1) Attitude information (Ref. Fig. 010) The aircraft roll and pitch attitude is indicated in the center part of the PFD by a sphere representing a conventional ADI drum. (Ref. 31-64-00 for sphere definition and display).
(a)
Pitch angle information (item A) The A/C present pitch angle is given by the vertical displacements of the pitch attitude scale with respect to the center of the A/C reference. The scale moves behind the cut-sphere shaped window, limited by the lines of an upper and a lower sector. The scale rotates around the center of the A/C reference in accordance with the A/C present roll angle. The pitch scale comprises white reference lines and associated pitch angle values. The lines are given every 2.5 degrees from 0 to 30 degrees, then for the 50 degrees and 80 degrees values for positive pitch angles. For negative pitch angles, the lines are given every 2.5 degrees from 0 to 10 degrees, then for the 15 degrees, 20 degrees, 30 degrees, 50 degrees and 80 degrees values. Beyond 30 degrees, red large arrow heads (V-shaped) indicate an excessive attitude and the direction to follow in order to reduce it (item B).
(b)
Roll angle information (item A) A yellow triangle which remains on the line going through the center of the A/C reference and which is perpendicular to the horizon line, moves against the fixed roll scale on the upper contour of the attitude sphere. This fixed roll scale comprises white marks for the 10 degrees, 20 degrees, 30 degrees and 45 degrees significant values, on either side of the zero position (horizontal wings) which is indicated by a small fixed triangle. The 60 degrees roll indication corresponds to the limits of the upper contour of the cut-sphere shaped window.
(c)
Attitude failure In case of attitude failure concerning the pitch and/or roll information, the attitude sphere goes out of view and is replaced by a red ATT flag which flashes for a few seconds then remains steady (item C). In case of discrepancy detected by the FWC between the pitch or roll attitude information presented on the CAPT and F/O PFDs, a CHECK ATT amber message flashes for a few seconds on both PFDs, then remains steady (item D).
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IR - Attitude Information Display
Figure 010
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(2) Heading information (Ref. Fig. 011) The aircraft magnetic or true heading is displayed on the PFD, the ND and the VOR/DME RMI. The true heading can be displayed on the CDU.
(a)
On the PFD When true heading is displayed, a TRUE white message appears above the heading scale (item A). A blank heading scale (with 10 deg. spaced marks without any indicated value) is provided on the horizon line. The marks are just under this line. This scale moves as the aircraft heading varies. For important nose-up or nose- down the heading graduations remain at the lower or upper sector limit. Below the sphere, a heading scale provides the pilot with the aircraft actual track and relative selection. This heading scale is graduated every 5 deg. (item A). In case of failure, the heading graduation disappears on the two scales and a red HDG flag appears on the lower heading scale (item B). It flashes for a few seconds, then remains steady. Furthermore, in case of discrepancy detected by the FWC between CAPT and F/O heading indications, with the heading signal valid, a CHECK HDG amber message is displayed at the center of the heading scale (item C).
(b)
On the ND (Ref. Fig. 012) The heading data is displayed on the ND in the three following operating modes: ROSE, ARC and PLAN. The ROSE mode and the ARC mode are oriented with respect to the aircraft heading, while the PLAN mode is oriented with respect to the true north.
1_ True heading display
In ROSE or ARC mode, when true heading is displayed, a cyan
TRUE message appears at the top of the ND.
2_ ROSE mode (item A)
In this mode, each pilot has three different sub-modes of
presentation on his ND: ROSE-ILS/ROSE-VOR/ROSE-NAV.
In the three ROSE sub-modes, the ND provides a display which
is similar to that of a conventional HSI, i.e. a rotating
heading dial orientated to the North and giving to the pilot
the aircraft actual magnetic or true heading with as reference
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