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EPGWS – MAITENANCE PRACTCE
1. General
A. This procedure has these tasks:
(1) Load the terrain database into the enhanced ground proximity warning computer
(EGPWC)
(2) Verify the terrain database part number.
TASK 34-42-00-470-CDF
2. Load the Terrain Database (Fig. 201)
A. General
(1) This task provides instructions to load the terrain database into the ground proximity
warning computer (EGPWS).
(2) The terrain database load is inhibited when the airplane is in the air. The database will
automatically load into the EGPWS after you install the database flash card into the
card slot on the front panel of the EGPWS.
(3) You can ignore caution notes (shown on the PCMCIA card) about damage if you put in
or remove the card when the power is on. The EGPWC automatically applies or
removes PCMCIA card power.
B. References
(1) AMM 34-42-00, Page CDF-501, Ground Proximity Warning System - Operational Test
C. Equipment
(1) Card - Flash, PCMCIA, Loaded with the Terrain Database (commercially available)
D. Access
(1) Location Zones
(a) 205 Electronic Compartment
E. Procedure
SUBTASK 860-308
(1) Make sure the enhanced ground proximity warning system (EGPWS) is operational.
(AMM 34-42-00 Page CDF-501)
SUBTASK 860-309
(2) Make sure the COMPUTER OK light on the front panel of the EGPWC is on.
SUBTASK 860-310
(3) Make sure the EXTERNAL FAULT and the COMPUTER FAIL lights on the front panel
of the EGPWC are off.
SUBTASK 860-311
(4) Open the door on the front panel of the EGPWC.
SUBTASK 860-313
(5) Make sure the IN PROG, CARD CHNG, XFER COMP, and XFER FAIL lights on the
EGPWC are off.
For Training Purpose Only Printed:May 2005
B757-200Aircraft Recur rent Training Manual - 19 -
Enhanced Ground Proximity Warning Computer
Figure 201
SUBTASK 470-002
(6) Do these steps to load the terrain database:
NOTE: If you install a version of the terrain database that is not compatible with the
hardware memory, then the EGPWC will not operate. Replacement of the
EGPWC will be necessary. More information about version compatibility can
be found in the applicable Honeywell Service Bulletin.
(a) Insert the card for the terrain database into the card slot on the EGPWC.
NOTE: After the card is installed, the terrain database will automatically load
into the EGPWC. Depending on the terrain database version, it takes
between 5 and 45 minutes to load the terrain database.
(b) Make sure the IN PROG light on the EGPWS comes on.
(c) If the CARD CHNG light on the EGPWC comes on, do these steps to change the
card:
For Training Purpose Only Printed:May 2005
B757-200Aircraft Recur rent Training Manual - 20 -
NOTE: When the CARD CHNG light comes on, it indicates that more than one
card is necessary to load the terrain database.
1) Push the eject button on the EGPWC and remove the card.
2) Insert the next card for the terrain database into the card slot on the EGPWC.
3) Make sure the IN PROG light on the EGPWC comes on.
(d) If the XFER FAIL light on the EGPWC comes on, it indicates that the terrain
database load has failed. You need to load the terrain database again.
(e) After the load of the terrain database is complete, make sure the IN PROG light
on the EGPWS goes off and the XFER COMP light comes on.
(f) Push the eject button on the EGPWC and remove the card.
(g) Make sure the COMPUTER OK light on the EGPWC is on and all the other lights
are off.
SUBTASK 700-004
(7) Do this task: Verify the Terrain Database Part Number
(AMM 34-42-00, page CDF-203).
TASK 34-42-00-700-CDF
3. Verify the Terrain Database Part Number (Fig. 201)
A. General
(1) This task provides instructions to verify the terrain database part number. The EGPWS
level 3 self-test provides aural anunciations of the current configuration that include the
terrain database part number.
(2) The EGPWS level 3 self-test can only be activated when the airplane is on the ground.
B. References
(1) AMM 34-42-00, page CDF-201, Load the Terrain Database.
C Access
(1) Location Zones
205 Electronic Compartment
101/102 Flight Compartment
D. Procedure
SUBTASK 860-265
(1) Make sure the enhanced ground proximity warning system (EGPWS) is operational.
SUBTASK 860-266
(2) Make sure the COMPUTER OK light on the front panel of the EGPWS is on and the
other lights are off.
SUBTASK 860-269
(3) Make sure there is no card in the card slot of the EGPWS.
SUBTASK 700-001
(4) Do these steps to do the level 3 self-test of the EGPWS:
NOTE: The EGPWS self-test has six levels that operate in sequence. The level 3
　
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