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This flag appears when both FACs are inoperative, or in case of SFCC dual flap/slat channel
failure.
In this case, the following PFD information is lost : VLS, S, F, Green Dot, Vtrend, VMAX, VFE
next, VSW.
(9) V1 INOP flag (red)
When the V1 signal is not valid, a V1 INOP flag replaces the digital value.
(10) ALT flag (red)
If the altitude information fails, the ALT flag replaces the altitude scale.
(11) CHECK ALT flag (amber)
The CHECK ALT flag appears, as does an ECAM caution, if the disagree between the two
PFD altitude indications is greater than 250 ft when QNH is selected, or 500 ft when STD is
selected.
The caution and the flag disappear, when the Pilot's and the Co-pilot's barometer references
disagree.
(12) ALT SEL flag (red)
If the selected altitude information fails, an ALT SEL flag appears.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 63/68
FCOM 19 AUG 10
(13) V/S flag (red)
If the vertical speed information fails, the V/S flag replaces the vertical speed scale.
(14) LOC and G/S flags (red)
If the localizer or glideslope receiver fails, a LOC or G/S flag appears on the deviation scale.
(15) V/DEV flag (red)
If the vertical deviation information fails, and the LS pushbutton is not pressed, a V/DEV flag
replaces the V/DEV scale.
(16) RA flag (red)
If both radio altimeters fail, this flag appears in place of the radio height indication.
(17) DH flag (amber)
A DH flag appears, when the aircraft reaches the selected DH.
(18) HDG flag (red)
If the heading information fails, the HDG flag replaces the heading scale.
(19) CHECK HDG flag (amber)
The CHECK HDG flag appears, as does an ECAM caution, if there is a discrepancy (5 °)
between pilots’s, and copilot’s heading indications.
(20) MACH flag (red)
This flag appears, if the Mach data fails.
(21) V/DEV (amber)
At the top of the glide scale, this message flashes in approach phase and, when either
the FINAL mode is armed/engaged, or a non-LS approach has been selected, and the LS
pushbutton is selected.
(22) DME 1 flag (red)
When the DME distance is not valid, a DME1 (on PFD1) or DME2 (on PFD2) flag replaces the
DME distance indication.
(23) ILS1 flag (red)
If an ILS frequency fails, or if either the LOC or G/S signals fail, an ILS1 (on PFD1) or ILS2 (on
PFD2) flag replaces the ILS frequency indication.
(24) WINDSHEAR warning (red)
This message is displayed, when windshear is detected (reactive windshear warning) by the
FAC.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
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FCOM 19 AUG 10
The detection function is available, when slats/flaps are extended as follows :
‐ At takeoff, from 5 s after lift-off, up to 1 300 ft RA.
‐ At landing, from 1 300 ft RA down to 50 ft RA,
After windshear detection, the message is displayed for at least 15 s, and is associated with an
aural “WINDSHEAR” warning, which is repeated 3 times.
(25) W/S AHEAD
This message is displayed, when the predictive windshear system has detected windshear
ahead of the aircraft.
The message is in amber or red, depending on the alert level.
Refer to DSC-34-60-30 WINDSHEAR ALERTS inhibition
Note: 1. All flags, except SI, V1 INOP and DME 1 (which are steady), flash for 9 s, then are
steady.
The DH flag flashes for 3 s, then is steady.
2. For information on the TCAS flag, Refer to DSC-34-80-10 TCAS MODES.
BACKUP SPEED/ALTITUDE SCALE
Applicable to: , , MSN,,,,
GENERAL
A backup speed scale and a backup altitude scale replace simultaneously the normal speed and
altitude scales when all the three ADRs are switched OFF. This enables the flight crew to fly at a
safe speed and altitude in case of an unreliable speed/altitude indication.
The backup speed scale information is based on the angle–of–attack, and depends on the slat/flap
configuration.
The backup altitude scale displays the GPS altitude.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 65/68
FCOM 19 AUG 10
BACKUP SPEED SCALE
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
INDICATING / RECORDING SYSTEMS
INDICATIONS ON PFD
A318/A319/A320/A321 FLEET DSC-31-40 P 66/68
FCOM 19 AUG 10
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A320机组操作手册FLIGHT CREW OPERATING MANUAL 3(118)
