EGPWS LINE MAINTENANCE MANUAL
Installations that do not have the windshear function or the function enabled will not enunciate the windshear message and illuminate windshear alert lights. Similarly, installations without the Terrain Alerting and Display (TAD) function enabled will not have terrain lights and display or “TERRAIN” aural enunciation.
•NOTE: The general sequence of the LEVEL 1
•NOTE: Ensure that none of the RAAS maintenance messages or RAAS
•NOTE: An enunciation of “GPS NOT NAVIGATING” during the Level 1
3.3.3 LONG LEVEL 1 SELF-TEST
The Long Level 1
3.4 LEVEL 2 SELF-TEST - CURRENT FAULTS
Level 2
If a fault is detected, it will be classified as either an internal or an external fault. Internal faults are defined as those faults that originate within the EGPWC. Internal faults will turn on the red “COMPUTER FAIL” LED on the EGPWC front panel. External faults are defined as those faults that originate from sources outside the EGPWC. External faults will turn on the amber “EXTERNAL FAULT” LED on the EGPWC front panel.
Note that for the EGPWS/GNSSU
If the EGPWC is connected to a GPS or GNSSU for position information (internal or external), various navigation data status messages may also be listed during Level 2 Self Test. These messages indicate that there is a problem with the position data, caused by antenna problems, satellite visibility or
*Useful Tip #2 – Pressing the GPWS test switch for more than 2 seconds during Level 2 through 5 will bypass the test information and will immediately jump to the end of that level (“PRESS TO CONTINUE” voice). GPWS INOP, Windshear INOP, and Terrain INOP (or Terrain Not Available) lights are turned on (or remain on) for the duration of the Level 2
CAGE CODE: 97896 | SCALE: NONE SIZE: A DWG NO.: | REV: G | SHEET 26 of 68 |