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34-48-00 EGPWS MODES
CONTENTS:
General
Warning Modes
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Terrain Awareness And Display (TAD)(JAA & FAA)
Terrain Clearance Floor (TCF)
Self Examination
TMUEGPE01 LEVEL 3
EFFECTIVITY 34-48-00 Page 1
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 347
ALL
EGPWS MODES
GENERAL
The Enhanced Ground Proximity Warning System (EGPWS)
computes and compares the aircraft behaviour with a
predermined envelope.
WARNING MODES
When the warning envelope is penetrated, visual and
aural warnings are generated.
The aural messages are broadcast through the cockpit
loudspeakers and visual warnings are indicated by the
GPWS / G/S pushbutton lights and the GPWS control
panel.
A terrain image is displayed on the ND.
NOTE: A number of airports through the world have
approaches or departures which are not entirely
compatible with the standard GPWS operation.
These airports are identified in the data base,
the GPWS recognizes them and modifies the profile
and triggers the warning in accordance.
TMUEGPE01-T01 LEVEL 3
EFFECTIVITY 34-48-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 348
ALL
EGPWS MODES - WARNING MODES
TMUEGPE01-P01 LEVEL 3
EFFECTIVITY 34-48-00 Page 3
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 349
ALL
EGPWS MODES
MODE 1
Mode 1 provides an alert warning for high descent rates
into terrain and for rapidly increasing sink rates
near the runway when landing.
The SINK RATE voice message changes into PULL UP when
the aircraft reaches the inner boundary.
These alerts will continue until the boundary
penetration is corrected.
TMUEGPE01-T02 LEVEL 3
EFFECTIVITY 34-48-00 Page 4
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
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ALL
TMUEGPE01-P02 LEVEL 3
EGPWS MODES - MODE 1
EFFECTIVITY 34-48-00 Page 5
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 351
ALL
EGPWS MODES
MODE 2
Mode 2 provides a warning based on the radio height
and on how rapidly the radio height decreases.
Mode 2A: Landing flaps not down and not in the glide
slope beam (TERRAIN, TERRAIN).
Mode 2B: Landing flaps down or in the glide slope beam
within +/- 2 dots of deviation (ILS approach) (PULL
UP).
When in landing configuration the voice message will
only be "TERRAIN" until the barometric altitude
increases by 300 ft.
TMUEGPE01-T03 LEVEL 3
EFFECTIVITY 34-48-00 Page 6
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
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ALL
EGPWS MODES - MODE 2
TMUEGPE01-P03 LEVEL 3
EFFECTIVITY 34-48-00 Page 7
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 353
ALL
EGPWS MODES
MODE 3
Mode 3 provides a warning for excessive altitude loss
after take-off, climb or during a go-around (DON’T
SINK).
This mode is based on radio height, altitude (inertial,
barometric or computed altitude) and altitude rate
(IVS computed altitude rate or barometric altitude
rate).
TMUEGPE01-T04 LEVEL 3
EFFECTIVITY 34-48-00 Page 8
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 354
ALL
EGPWS MODES - MODE 3
TMUEGPE01-P04 LEVEL 3
EFFECTIVITY 34-48-00 Page 9
Aug 31/98
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 34 NAVIGATION
UF94200
EFFECTIVITY Page 355
ALL
EGPWS MODES
MODE 4
Mode 4 generates warnings based on the radio height,
computed airspeed and aircraft configuration.
TOO LOW TERRAIN is broadcast when the aircraft is below
1000 ft with landing gear retracted and/or flaps not
in landing configuration.
TOO LOW GEAR or TOO LOW FLAPS are broadcast depending
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