GROUND PROXIMITY WARNING MODULE, M7990
A
ACCESS GROUND PROXIMITY
DOOR, 117AL WARNING COMPUTER, X85
FWD (E1-4)
SEE B GROUND PROXIMITY
WARNING COMPUTER, X85
MAIN EQUIPMENT CENTER
B
Ground Proximity Warning System - Component Location
Figure 102
K62064
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A
747-400 MAINTENANCE MANUAL
GROUND PROXIMITY WARNING SYSTEM - MAINTENANCE PRACTICES
________________________________________________________
1. General_______
A. This procedure has these tasks:
(1)
Load the terrain database into the ground proximity warning computer (GPWC).
(2)
Verify the terrain database part number.
TASK 34-46-00-472-013
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 (GPWC).
(2)
The terrain database load is inhibited when the airplane is in the air. The database will automatically load into the GPWC after you install the database flash card into the card slot on the front panel of the GPWC.
(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 and removes PCMCIA card power.
B. Standard Tools and Equipment
(1) Card - Flash, PCMCIA, Loaded with the Terrain
Database (commercially available)
C. References
(1) AMM 34-46-00/501, Ground Proximity Warning System
D. Access
(1) Location Zones 117 Electrical and Electronics Compartment, LH 118 Electrical and Electronics Compartment, RH
E. Procedure
S 862-014
(1) Make sure the ground proximity warning system (GPWS) is operational (AMM 34-46-00/501).
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A
747-400
MAINTENANCE MANUAL
MAIN EQUIPMENT CENTER RACK E1-4
SEE A
ELECTRICAL AND ELECTRONIC COMPARTMENT
STATUS
INDICATORS
SELF TEST
SWITCH
HEADPHONE UPLOAD/DOWNLOAD
JACK STATUS INDICATORS
MEMORY CARD
SLOTDOOR RE-232
CONNECTOR
HANDLE
GROUND PROXIMITY WARNING COMPUTER (GPWC) A
Ground Proximity Warning Computer Figure 201
H82107
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747-400
MAINTENANCE MANUAL
S 862-015
(2)
Make sure the COMPUTER OK light on the front panel of the GPWC is on.
S 862-016
(3)
Make sure the EXTERNAL FAULT and the COMPUTER FAIL lights on the front panel of the GPWC are off.
S 862-017
(4)
Open the door on the front panel of the GPWC.
S 862-018
(5)
Make sure the IN PROG, CARD CHNG, XFER COMP, and XFER FAIL lights on the GPWC are off.
S 472-033
CAUTION: REFER TO THE APPLICABLE HONEYWELL SERVICE BULLETIN BEFORE YOU
_______ INSTALL NEW TERRAIN DATABASE SOFTWARE. THE SERVICE BULLETIN TELLS WHICH EGPWC PART NUMBERS OPERATE CORRECTLY WITH THE NEW TERRAIN DATABASE SOFTWARE. IF YOU TRY TO INSTALL A NEW TERRAIN DATABASE ON A DIFFERENT EGPWC PART NUMBER, THE EGPWC WILL NOT OPERATE.
(6) Do these steps to load the terrain database:
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