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11) “SINK RATE, PULL UP” message is enunciated.
12) Release the Self Test Switch.
13) Push the Terrain Display lightswitch on the P9 panel and the Terrain Display
Self Test Pattern is displayed on the Weather Radar Indicator.
14) ” TERRAIN PULL UP “message is enunciated.
15) “DON’T SINK, DON’T SINK” message is enunciated.
16) “TOO LOW TERRAIN ”message is enunciated.
17) “TOO LOW GEAR ” message is enunciated.
18) “TO LOW FLAPS” message is enunciated.
19) “TOO LOW TERRAIN ”message is enunciated.
20) “GLIDESLOPE” message is enunciated.
21) “BANK ANGLE, BANK ABGLE” message is enunciated.
22) “MINIMUMS” message is enunciated.
23) “FIVE HUNDRED” message is enunciated.
24) “ONE HUNDRED” message is enunciated.
25) “FIFTY” message is enunciated.
26) “FORTY” message is enunciated.
27) “THIRTY” message is enunciated.
28) “TWENTY” message is enunciated.
29) “TEN” message is enunciated.
30) “TOO LOW TERRAIN” message is enunciated.
For Training Purpose Only Printed:May 2005
B757-200Aircraft Recur rent Training Manual - 24 -
31) “CAUTION TERRAIN CAUTION TERRAIN” message is enunciated.
32) “TERRAIN TERRAIN PULL UP “ message is enunciated.
33) ON legend in the Terrain Select/INOP switch light turns off and the Terrain
Display Self Test Pattern turns off after several sweeps of the terrain
displayed .
34) The Terrain INOP light and GPWS INOP light turn off.
35) End of Operational test.
NOTE: If EGPWS Computer or System fault(s) exist, the fault(s) will be
enunciated as GPWS internal faults and/or GPWS external faults. The
aural message will provided a description of the fault(s).
S 845-006-001
(3) Put the Airplane Back to its Usual Condition.
TASK 34-42-00-735-008-CDF-001
3. EGPWS System Test
A. General
(1) The system test does an internal EGPWS check and a check of system interfaces.
(2) This test uses GPS data. The airplane must be moved to a position where the GPS
antennas have a clear view of the GPS satellites.
(3) Various systems interface with the EGPWS. Some systems send data. Some systems
send a single discrete signal.
(4) The systems that send data have verbal error messages. In this procedure, you do a
check of these signals when you turn a system off and hear an aural message
annunciated.
(a) Some systems supply two sources and are redundant. You turn one system off and
hear an aural message. The EGPWS will still function with data from the redundant
system. Then, you turn the second system off and look for the INOP light on the
ground proximity warning module to come on.
B. References
(1) AMM 34-42-00/CDF-201, Enhanced Ground Proximity Warning Computer
(2) AMM 34-42-01/CDF-401, Enhanced Ground Proximity Warning Computer
(3) AMM 24-22-00/201, Electrical Power - Control
C. Access
(1) Location Zones
101/102 Flight Compartment
205 Electronic Compartment
D. Prepare for the EGPWS System Test
S 865-038-001
(1) Supply electrical power (AMM 24-22-00/201).
S 865-011-001
(2) Make sure these circuit breakers on the overhead circuit breaker panel, P18, are
closed:
(a) GND PROX WARN AC
(b) EGPWS DSU
For Training Purpose Only Printed:May 2005
B757-200Aircraft Recur rent Training Manual - 25 -
S 865-314-002
(3) Make sure the aircraft is in a location where it can receive GPS signals.
S 865-068-002
(4) Set the left and right IRS mode select switches to the NAV position and align the left
IRS and right IRS.
S 750-133-002
(5) Make sure the green COMPUTER OK light on the EGPWS front panel is on.
(a) Make sure the yellow EXTERNAL FAULT light on the EGPWS front panel is not
on.
(b) Make sure the red COMPUTER FAIL light on the EGPWS front panel is not on.
S 865-097-002
WARNING: MAKE SURE THE FLAPS ARE CLEAR BEFORE YOU START THEM. IF
YOU DO NOT, INJURY TO PERSONS CAN OCCUR.
(6) Make sure the flaps are in the normal position (zero degrees).
S 865-098-002
(7) Install the landing gear lock pins.
S 865-099-002
(8) Remove hydraulic power from the landing gear systems.
S 715-107-002
(9) Do the GPWS - Operational Test (AMM 34-42-00/CDF-501).
E. Current Faults Test (Self Test Level 2)
NOTE: The Terrain INOP light will illuminate throughout this test.
NOTE: Self test Level 2 follows Self Test Level 1 such that Self Test Level 1 must be
performed to initiated Self Test Level 2.
S 740-019-002
　
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