-
to the right, an altitude scale and a vertical speed scale provide the pilot with the A/C actual baro altitude and baro/inertial vertical speed, plus the altitude and flight level selections.
-the vertical speed scale also gives the forbidden V/S zones when TCAS resolution advisories exist.
- on the lower part, a heading scale provides the pilot with the A/C actual magnetic heading, actual track, selected heading/track, and ILS course.
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- on the upper part, a full Flight Mode Annunciator provides the pilot with the various armed/active longitudinal and lateral modes, and the AP/FD/A-THR engagement status, plus various messages.
-at last, vertical and lateral deviation scales give A/C GLIDE/SLOPE deviation (or vertical deviation with respect to an FMS computed approach path) and LOCALIZER deviation.
For an improved legibility, the speed, altitude, vertical speed
and heading scales are presented on background shading areas in
dark grey color.
(Ref. Fig. 017)
1 Attitude area
_
-A/C attitude: The fixed A/C symbol (at the center of the PFD) and the fixed roll reference (at the top of the sphere) give the A/C actual pitch and roll indications on the sky/ground attitude sphere. Small green marks (+30 deg., -15 deg. in pitch and +/-65 deg. in roll) show the attitude protections granted by the EFCS in the normal law. They are replaced by X (amber) if protections are lost. In case of excessive attitude in pitch and/or roll, the PFD image is simplified for better legibility: the FMA, the guidance symbols, and the lateral and vertical deviation indications are removed.
-Heading marks: 10 deg. spaced heading marks are given just under the horizon line. When the AFS operates in basic HDG or TRACK mode, a vertical line indicates the selected heading or track on the horizon line.
-A/C flight path angle and track: (Ref. Fig. 016) By means of the HDG-V/S / TRK FPA pushbutton switch on the FCU, the crew can choose either set of basic modes for the AFS, and subsequent presentation on the PFD:
*
with the HDG V/S modes, the above A/C attitude
presentation is privileged
*
with the TRK FPA modes, the A/C symbol is dimmed and the flight-path vector symbol appears: It gives the A/C actual flight path angle and drift angle (track), whatever the FD P/B switch status.
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PFD - Typical Display
Figure 017
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-Guidance Either of these two modes of presentation of the Flight Director orders is available, depending on the HDG V/S -TRK FPA choice:
*
conventional crossed bars, pitch and roll, plus yaw bar
for T.O. and LAND modes.
(Ref. Fig. 017)
*
flight-path director symbols: in relation with the flight
path vector, they give the FD orders in flight path and in
track.
(Ref. Fig. 016)
Obviously, the guidance orders are presented on a given PFD provided that the FD pushbutton switch bars on the respective EFIS control section is on in green color, which corresponds to the FD ON selection. Moreover, at least one FD must be engaged.
(b) Navigation display Each pilot has 5 different modes of presentation of his ND at his disposal:
-
ROSE ILS
-
ROSE VOR
-
ROSE NAV
-ARC
-PLAN. (Ref. Fig. 018, 019, 020) In the three ROSE modes, the ND provides an image similar to that of a conventional horizontal situation indicator, i.e. a rotating heading dial orientated to the magnetic North. This dial gives the pilot the A/C actual magnetic heading with as reference the fixed yellow lubber line at the top of the dial. The ND display is always heading up. A yellow A/C symbol, at the center of the heading dial, is fixed and pointed up to the yellow lubber line.
Above 73 deg. North or 60 deg. South, the TRU indication is displayed above the heading indication.
Small white triangles are arranged in the 45 deg positions on the circumference with as reference the aircraft lubber line. They are fixed and do not turn with the heading dial. A green diamond-shaped symbol which moves around the heading dial gives the A/C actual track. If a value is displayed on the HDG TRK counter of the FCU, it is represented on the ND by a cyan triangle which moves around the heading dial.
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