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configuration conditions:
* Program pin parity
* Airplane configuration database validity
* Airplane type.
If the test finds a configuration fault, the self-test annunciates the
fault and the self-test ends. If the GPWS passes the
configuration test, the level one test continues.
Training Information Point
You can start a level one test from the front panel of the GPWC,
but you cannot see the flight deck annunciations. Use the GPW
module to start an operational test of the GPWS.
Short Level One Test - Normal Indications
These visual and aural annunciations are for a normal level one
test:
* ND system message TERR TEST shows in cyan
* Ground proximity warning light on 0.7 seconds
* Glideslope lights on 0.7 sec and aural message
GLIDESLOPE
* Pull-up message below the ADI on for 0.7 sec and aural
WHOOP WHOOP PULL-UP
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* Windshear message below the ADI on 0.7 sec and a two tone
siren followed by the aural WINDSHEAR, WINDSHEAR,
WINDSHEAR
* Terrain test pattern on the ND for 12 seconds and the aural
message TERRAIN, TERRAIN, PULL-UP.
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* Terrain database version number in the center of the terrain
test pattern on the ND.
SHZ ALL
Long Level One Test
To start the long level one test, push and hold the test button for
5 seconds. This will do the short level one test then continue to
give voice callouts for all customer selected items.
Training Information Point
To continue the GPWS BITE to the next level, push the test
button after the GO-NO-GO (level 1) test is complete. No
annunciation will instruct the operator to push the test button on
the GPWM at the end of the go-no-go (level 1) test to continue
with the BITE.
Level One Self Test - Non-Normal Indications
The GPWS level one test fails for any of these conditions:
* Terrain test pattern does not show
* TERR FAIL message on the ND stays on
* You do not see and hear all annunciations.
Training Information Point
Some GPWS modes have the same annunciations. If you do not
see and hear all annunciations, the test fails.
GPWS Mode Failures
These aural messages are for GPWS modes that do not
function:
* GLIDESLOPE INOP
* GPWS INOP
* BANK ANGLE INOP
* CALLOUTS INOP
* WINDSHEAR INOP
* TERRAIN INOP.
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General Description
The ground proximity warning computer (GPWC) has six levels
of self test:
* 1 - GO/NO-GO operational test
* 2 - Current faults
* 3 - System configuration
* 4 - Fault history
* 5 - Alert/warning history
* 6 - Discrete input test.
Self-test levels 2-6 access is through the GPW module and the
GPWC. When you use the GPWC, a 600 ohm headphone is
necessary to listen to the test information. Plug the headphone
into the jack on the front panel of the GPWC. If you do the tests
from the flight deck, the information comes over the flight deck
speakers.
Use the self-test button on the front panel of the GPWC or the
self-test button on the GPW module to get access to levels 2-6.
The self-test button has these two modes:
* Short cancel - push the button for less than two seconds
* Long cancel - push the button for more than two seconds.
Use the self-test buttons for these functions:
* Start self-test level one
* Go to the next item or flight leg within a test
* Go to the next self-test level
* End the self-test.
When test level 1 ends, there is no aural message, push the test
　
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