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The radio height is displayed at the bottom of the
attitude sphere for heights less than 2500 feet.
The indication accuracy is in function of the height.
- H > 50 ft: 10 ft increments,
- 5 ft < H <= 50 ft: 5 ft increments,
- H <= 5 ft: 1 ft increments.
ANALOG INDICATION
A red ribbon is displayed on the right of the altitude
scale representing the field elevation.
This red ribbon is displayed below 570 ft.
On ground the top of the ribbon is on the middle of
the altitude window.
TMURADB01-T01 LEVEL 2
EFFECTIVITY 34-42-00 Page 2
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RA INDICATIONS ON PFD: DH AND RADIO HEIGHT
TMURADB01-P01 LEVEL 2
EFFECTIVITY 34-42-00 Page 3
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RA INDICATIONS ON PFD AND AUTOMATIC CALL OUT
RISING RUNWAY INDICATING
In the final phase of an approach, below 150 feet, the
white lower limit of the attitude sphere moves up as
the aircraft approaches the ground.
This lower limit line covers the graduations of the
pitch scale when it moves up.
FAILURE
When the slat/flap lever is not at zero, if both Radio
Altimeters fail, a red RA flag is shown in place of
the radio height information.
Independently of slat/flap position, with failure of
both RA, the red ribbon indication goes out of view
and the white lower limit line remains in its position.
AUTOMATIC CALL OUT
Below 400 feet, the radio altitude is announced by a
synthetic voice,generated by the Flight Warning
Computer (FWC).
The altitude call out corresponds to predetermined
thresholds selected by pin programming listed
hereafter:
- 400: four hundred
- 300: Three hundred
- 200: two hundred
- 100: one hundred
- 50: fifty
- 40: forty
- 30: thirty
- 20: twenty
- 10: ten
- 5: five
- DH + 100: hundred above
- DH: minimum
TMURADB01-T02 LEVEL 2
EFFECTIVITY 34-42-00 Page 4
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TMURADB01-P02 LEVEL 2
RA INDICATIONS ON PFD: RISING RUNWAY INDICATING AND FAILURE
EFFECTIVITY 34-42-00 Page 5
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SELF EXAMINATION
With DH of 100ft entered on the MCDU, when will the
radio altitude indication become amber?
A - At 100 ft.
B - At 200 ft.
C - At 400 ft.
When does the red RA flag appear on the PFD?
A - When one RA fails.
A - When both RAs fail and the slats are
extended.
A - When both RAs fail below 2500ft.
TMURADB01 LEVEL 2
EFFECTIVITY 34-42-00 Page 6
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34 - NAVIGATION
34-42-00 RADIO ALTIMETER COMPONENTS
CONTENTS:
RA Transceivers
RA Fans
RA Antennae
TMURADD01 LEVEL 3
EFFECTIVITY 34-42-00 Page 1
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RADIO ALTIMETER COMPONENTS
RA TRANSCEIVERS
IDENTIFICATION
FIN: 2SA1, 2SA2
LOCATION
ZONE: 152
COMPONENT DESCRIPTION
The face of the transceiver is fitted with a TEST p/b,
a TEST connector and four LEDS.
When the TEST p/b is pressed in, the four LEDs come
on.
If the test is OK, the four LEDs go off when the TEST
p/b is released out.
The back is fitted with an ARINC 600 electrical
connector.
TMURADD01-T01 LEVEL 3
EFFECTIVITY 34-42-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
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RA COMPONENTS - TRANSCEIVERS
TMURADD01-P01 LEVEL 3
EFFECTIVITY 34-42-00 Page 3
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
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ALL
RADIO ALTIMETER COMPONENTS
RA FANS
IDENTIFICATION
FIN: 3SA1, 3SA2
LOCATION
ZONE: 152
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