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History.) After “WARNING HISTORY” is enunciated, perform a long cancel (press
the GPWS test switch for between 2 and 8 seconds).
For Training Purpose Only Printed:May 2005
B757-200 Aircraft Recurrent Training Manual - 56 -
6. Within 3 seconds after the “PRESS TO CONTINUE” message is enunciated, press the
GPWS test switch for less than 2 seconds. (This will start Level 6 Self Test.)
7. The EGPWC will enunciate “DISCRETE INPUT TEST PRESS TO CANCEL “. The EGPWC is
now at the Level 6 Self Test.
NOTE: The words “DISCRETE INPUT TEST PRESS TO CANCEL” will be enunciated
approximately every 60 seconds throughout this test.
8. VERIFY the correct audio message is enunciated as each discrete is set as shown in
the following table:
NOTE: Each discrete must be changed to be set to the value listed below (i.e. when
setting (or simulating) Flaps in Landing Position, the Flaps must start in the
UP position).
Signal Pin Polarity Test Value Expected Audio Message Pass Fail
Air/Ground MP 1A
Gnd = Air
In Air
(can be simulated)
“NOT ON GROUND”
Air/Ground MP1A
Gnd = Air
Ground “ON GROUND”
Gear MP9B
Gnd = Dn
Landing Gear Up
(move gear handle to center
or neutral position)
“LANDING GEAR UP”
Gear MP9B
Gnd = Dn
Gear Override
(engage GND PROX GEAR OVRD
switch)
“LANDING GEAR DOWN”
Gear MP9B
Gnd = Dn
Landing Gear Up and Normal
(disengage GND PROX GEAR
OVRD switch)
“LANDING GEAR UP”
Gear MP9B
Gnd = Dn
Landing Gear Down
(move gear handle to down
position)
“LANDING GEAR DOWN”
Flap MP9C
Gnd = Land
Flaps in Landing Position
(engage GND PROX FLP OVRD
switch)
“LANDING FLAPS”
Flap MP9C
Gnd = Land
Flaps Not in Landing
Position (disengage GND
PROX FLP OVRD switch)
“NOT LANDING FLAPS”
Flap MP9C
Gnd = Land
Flaps in Landing Position
(Engage GND PROX FLAP OVRD
Switch)
“LANDING FLAPS”
For Training Purpose Only Printed:May 2005
B757-200 Aircraft Recurrent Training Manual - 57 -
Flap MP9C
Gnd = Land
Flaps Not in Landing
Position (Disengage GND
PROX FLAP OVRD Switch)
“NOT LANDING FLAPS”
Glideslope
Cancel
MP9D
Gnd = Cancel
Cancel
(GND PROX light pressed)
“GLIDESLOPE CANCELED”
Glideslope
Cancel
MP9D
Gnd = Cancel
Normal “GLIDESLOPE ENABLED”
TERR OVRD MP14B
Gnd = Active
OVRD selected “TERRAIN OFF”
TERR OVRD MP14B
Gnd = Active
Normal “TERRAIN ON”
9. Press the GPWS test switch for less than 2 seconds (to exit Level 6 Self Test).
10. VERIFY the GND PROX BITE or GND FROX SYS message, annunciated on the EICAS system
display, and the Terrain INOP light turns off.
PASS FAIL
11. End of Self Test Level 6 Test.
6.3 Secondary Input Interface Test
This section verifies the redundant inputs to the EGPWC are wired correctly.
NOTE: This test requires prior completion of a level 2 self-test. (See Section 6.2.4)
Test Procedure:
1. Pull the following circuit breakers:
a) ADC #1
b) ILS #1
c) EFIS Control Panel #1
d) LRRA #1 (Left Radio Altimeter)
e) LRRA #2 (Right Radio Altimeter)
f) FMC #1
2. Turn the IRS #1 selector to OFF and wait one minute.
3. Perform a level 2 self test.
Initiate the EGPWS self test (level 1) and release the GPWS test switch. Once the
level 1 self test audio sequence begins, press and hold the GPWS test switch for less
than 2 seconds. This will start self-test level 2.
4. VERIFY the following messages are annunciated (note order of messages is not
important):
For Training Purpose Only Printed:May 2005
B757-200 Aircraft Recurrent Training Manual - 58 -
a) CURRENT FAULTS:
b) GPWS COMPUTER OK
c) EXTERNAL FAULTS
d) AIR DATA BUS 1 INACTIVE
e) ILS BUS 1 INACTIVE
f) IRS BUS 1 INACTIVE
g) EFIS BUS 1 INACTIVE
h) RADIO ALTIMETER BUS 1 INACTIVE or LEFT RADIO ALTIMETER BUS INACTIVE
i) RADIO ALTIMETER BUS 2 INACTIVE or CENTER RADIO ALTIMETER BUS INACTIVE
j) FMC BUS 1 INACTIVE
k) “PRESS TO CONTINUE”
PASS FAIL
5. Restore the following circuit breakers:
a) ADC #1
b) ILS #1
c) EFIS Control Panel #1
d) LRRA #1
e) LRRA #2
f) FMC #1
6. Turn the IRS #1 mode selector to NAV and wait until the IRS is aligned.
7. Perform a level 2 self test.
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