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TMUADIH01 LEVEL 2
EFFECTIVITY 34-10-00 Page 1
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 99
ALL
ADIRS INDICATIONS ON PFD
ATTITUDE
The inertial attitude data is displayed by a sphere
in the middle of the Primary Flight Display (PFD).
1. PITCH SCALE
The aircraft pitch angle is given by the displacement
of the pitch attitude scale (white) through a display
window.
For pitch angles of more than 25° or than - 13°, the
guidance symbols and the Flight Mode Annunciator (FMA)
are removed.
2. ROLL SCALE
The fixed roll scale (white) comprises roll
graduations.
For roll angles of more than 45° the guidance symbols
and the Flight Mode Annunciator (FMA) are removed.
3. ROLL INDEX
The roll index (yellow) attached to the sphere moves
along the fixed roll scale and provides the roll data
(Aircraft bank angle).
TMUADIH01-T01 LEVEL 2
EFFECTIVITY 34-10-00 Page 2
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 100
ALL
TMUADIH01-P01 LEVEL 2
ADIRS INDICATIONS ON PFD - ATTITUDE (SHEET 1/2)
EFFECTIVITY 34-10-00 Page 3
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 101
ALL
ADIRS INDICATIONS ON PFD
4. FLIGHT PATH VECTOR
The flight path vector (green) indicates the actual
aircraft inertial trajectory.
The flight path vector is used as a reference when the
Flight Director (FD) is engaged in TRACK/FLIGHT PATH
ANGLE mode (TRK/FPA).
5. DISCREPANCY
When an attitude discrepancy is detected between the
Captain display and the First Officer display, an amber
CHECK ATT message is displayed on both PFDs associated
with aural and visual ECAM cautions.
The attitude discrepancy threshold is 5°.
This discrepancy is detected by comparison of the 2 IRSs
in use within the Flight Warning Computer (FWC).
6. FAILURE
In case of attitude failure, the attitude sphere is
cleared and replaced by an attitude flag (ATT red).
The red ATT flag first flashes then remains steady.
The failure is detected by the associated Air Data
Inertial Reference Unit (ADIRU).
TMUADIH01-T02 LEVEL 2
EFFECTIVITY 34-10-00 Page 4
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 102
ALL
ADIRS INDICATIONS ON PFD - ATTITUDE (SHEET 2/2)
TMUADIH01-P02 LEVEL 2
EFFECTIVITY 34-10-00 Page 5
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 103
ALL
ADIRS INDICATIONS ON PFD
HEADING
The magnetic heading is displayed in the lower section
of the Primary Flight Display (PFD) and with a white
heading scale on the horizon line.
1. HEADING SCALES
Two moving heading scales (white) provide the crew
with heading data.
2. HEADING REFERENCE LINE
A fixed heading reference line (yellow) shows the
actual heading on the lower heading scale.
3. ACTUAL TRACK SYMBOL
The diamond shaped symbol (green) indicates the Actual
Track.
4. TRUE HEADING
TRU (white) indicates that true heading is displayed
instead of magnetic heading (automatically when
latitude above 73° north or below 60° south for polar
navigation).
5. DISCREPANCY
When a heading discrepancy is detected between the
Captain display and the First Officer display, an amber
CHECK HDG message is displayed on both PFDs associated
with aural and visual ECAM cautions.
The heading discrepancy threshold is 5°.
This discrepancy is detected by a comparison of the 2 IRs
in use within the Flight Warning Computers (FWC).
6. FAILURE
In case of heading failure, the graduations from the
two scales disappear and are replaced on the lower
scale by the red HDG flag.
The red HDG flag first flashes then remains steady.
The failure is detected by the associated ADIRU.
TMUADIH01-T03 LEVEL 2
EFFECTIVITY 34-10-00 Page 6
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 104
ALL
ADIRS INDICATIONS ON PFD - HEADING
TMUADIH01-P03 LEVEL 2
EFFECTIVITY 34-10-00 Page 7
Sep 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
　
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