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Description:  “CONFIGURATION MODULE NOT COMPATIBLE (WinViews ONLY) 
Probable Cause:  The Configuration Module is faulty. 
Action:  Cycle power to the EGPWC.  If the persist reprogram the Configuration Module.  If the condition persist, replace the Program Module.  See Appendix C. 
Description:  “SUPPORT TASK FAILED” 
Probable Cause:  Fault History Memory Full. 
Action:  Erase Fault History. 
Description:  “SYSTEM OR MODE TASKED FAILED” 
Probable Cause:  Conflicting Configuration of the same channel. 
Action:  Check configuration of channels. 

For example, if the Computed Airspeed from Air Data Computer #1 is failed (i.e., SSM = Fail Warning), the following messages would be enunciated:
“CURRENT FAULTS”
“EGPWC OK”
“EXTERNAL FAULTS”
“AIR DATA BUS 1 COMPUTED AIRSPEED FAULT”
“PRESS TO CONTINUE”
NOTE: Before attempting to correct an external fault, verify that the EGPWS installation configuration matches the aircraft configuration.  If the installation configuration and aircraft configuration does not match, check the Program Pin or Configuration Module connections being sure to cycle power to the EGPWC in the process.  If an incorrect aircraft configuration exists, the Program Pins must be changed or the Configuration Module may need to be reprogrammed (see Maintenance Practices) or replaced (see Removal/Installation section).
If the unit is a MkV or MkVII with integral GNSSU (-060 part number), and external faults are indicated on GPS signals (e.g., GPS BUS 1 LATITUDE FAULT), an internal fault may exist. In this case both fault lights will be on and the message INTERNAL GPS FAULT will also be indicated. This condition can also be caused by a disconnected or broken antenna wire. Ensure good antenna connection before replacing the EGPWS/GNSSU.
If no faults are detected, the following messages will be enunciated:
“CURRENT FAULTS”
“NO FAULTS”
“PRESS TO CONTINUE” If no faults are detected, but the GPS or GNSSU are not navigating properly, navigation status messages may be enunciated as follows:

“CURRENT FAULTS”
“NO FAULTS”

Navigation Status Messages
“PRESS TO CONTINUE”
The list of possible navigation problems is listed in Table 3–5.  In these instances, no fault lamps will be lit on the unit, however, TERRAIN INOP or TERRAIN UNAVAILABLE will be indicated on the Flight Deck.
TABLE 3-5: LEVEL 2 SELF-TEST – NAVIGATION STATUS MESSAGES

THE FOLLOWING GPS STATUS MESSAGES ARE AVAILABLE IN LEVEL 2 SELF-TEST: 
Enunciation:  “TERRAIN AWARENESS NO VALID LATITUDE” 
Probable Cause:  GPS/GNSSU has not acquired a sufficient number of satellites. 
　
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本文鏈接地址：增強型近地警告系統 Enhanced Ground Proximity Warning 航線維護手冊 Systems Line Maintenance Manual(28)