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MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 105
ALL
ADIRS INDICATIONS ON PFD
AIRSPEED
The Computed Airspeed (CAS),given by the ADR, is
displayed on the left hand side of the PFD.
1. AIRSPEED SCALE
A moving airspeed scale (white) with graduations in
knots provides the crew with airspeed information.
Airspeed display starts/stops at 30 kts. Below 30 kts,
the CAS label is set to NCD (No Computed Data).
The speed scale is graduated from 30 to 520 kts.
2. AIRSPEED REFERENCE LINE
A fixed airspeed reference line (yellow) shows the
actual airspeed on the airspeed scale.
The MACH number (green) is displayed if above 0.5 M
and no ILS selection. It disappears at 0.45 M.
3. FAILURE
In case of airspeed failure, the airspeed scale is
replaced by the red SPD flag.
The red SPD flag first flashes then remains steady.
In case of mach failure, the mach number is replaced
by the red MACH flag.
TMUADIH01-T04 LEVEL 2
EFFECTIVITY 34-10-00 Page 8
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 106
ALL
ADIRS INDICATIONS ON PFD - AIRSPEED
TMUADIH01-P04 LEVEL 2
EFFECTIVITY 34-10-00 Page 9
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 107
ALL
ADIRS INDICATIONS ON PFD
VERTICAL SPEED
The inertial Vertical Speed (V/S) is displayed on the
right hand side of the Primary Flight Display.
1. V/S SCALE
A vertical speed scale (white) with graduations in
feet per minute, provides the crew with vertical speed
information.
2. V/S POINTER
A pointer (green) provides the vertical speed in analog
form.
The pointer rotates around a point outside the V/S
scale.
Only the portion of the needle inside the scale is
displayed.
3. NUMERICAL VALUE
Above a V/S threshold, a numerical value (green) in
hundreds of feet per minute comes into view and follows
the pointer.
4. EXCESSIVE V/S
In case of excessive vertical speed, the digital and
analog indications become amber.
Excessive V/S when:
- V/S > 6000 ft/mn or V/s < - 6000 ft/mn,
- V/S < - 2000 ft/mn when 1000 < RA Height < 2500 ft,
- V/S < - 1200 ft/mn below 1000 ft RA Height.
5. DEGRADED DATA
When the inertial vertical speed is not available, the
baro vertical speed is automatically displayed.
An amber box surrounds the numerical value.
6. FAILURE
In case of vertical speed failure, the scale is
replaced by the red V/S flag.
TMUADIH01-T05 LEVEL 2
EFFECTIVITY 34-10-00 Page 10
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 108
ALL
ADIRS INDICATIONS ON PFD - VERTICAL SPEED
TMUADIH01-P05 LEVEL 2
EFFECTIVITY 34-10-00 Page 11
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 109
ALL
ADIRS INDICATIONS ON PFD
ALTITUDE
The Altitude is displayed on the right hand side of
the Primary Flight Display.
1. ALTITUDE SCALE
A moving altitude scale (white) with graduations every
hundred feet provides the crew with altitude
information.
2. ALTITUDE INDICATION
The aircraft altitude is shown in a window (yellow)
by a counter for hundreds of feet and a drum for tens
and units.
3. BARO REFERENCE
The baro reference can be standard (STD), QNH or QFE
(optional)(white) according to the selection made on
the EFIS control panel.
4. DISCREPANCY
When an altitude discrepancy is detected between the
Captain display and the First Officer display, an amber
CHECK ALT message is displayed on both PFDs associated
with aural and visual ECAM cautions.
The Altitude discrepancy threshold is:
- 250 ft with baro selected (QNH or QFE),
- 500 ft with STD selected.
This discrepancy is detected by comparison of the 2
ADRs in use within the Flight Warning Computers (FWC).
5. FAILURE
In case of altitude failure, the altitude scale is
replaced by the red ALT flag.
The red ALT flag first flashes then remains steady.
The failure is detected by the associated ADIRU.
TMUADIH01-T06 LEVEL 2
EFFECTIVITY 34-10-00 Page 12
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
　
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