.
Red Warning (Pull Up or GPWS) lights turns off
.
Terrain test pattern is turned off (after several sweeps)
.
GPWS INOP, Windshear INOP, and Terrain INOP (or Terrain Not Available) lights turn off
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 SELF-TEST is the same for all installations. The actual aural message and nomenclature of the Alert/warning lamps will vary.
3.3.3 LONG LEVEL 1 SELF-TEST
The Long Level 1 Self-Test is initiated by pressing and holding Self-Test until Self-Test voices start. The Long Level 1 Self-Test enunciates all configured and activated alert voices, including warning voices, caution voices, and altitude callout voices immediately following the Short Level 1 Self-Test sequence above.
3.4 LEVEL 2 SELF-TEST - CURRENT FAULTS
Level 2 Self-Test provides enunciation of all faults existing at the time of the test request. Level 2 Self-Test is initiated by pressing Self-Test within 3 seconds of the end of Level 1 Self-Test or following a short cancel during Level 1 Self-Test.
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 (-060 MkV/MkVII), both internal and external fault lights will be lit if there is a problem with the integral GNSSU subsystem.
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 Selftest. These messages indicate that there is a problem with the position data, caused by antenna problems, satellite visibility or multi-path errors.
During Level 2 Self-Test, a Short Cancel or Long Cancel terminates the Self-Test level and “PRESS TO CONTINUE” is enunciated for proceeding to Level 3 Self-Test. 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 Self-Test.
3.4.1 CURRENT FAULTS - INTERNAL
An internal fault indicates a problem with the EGPWC. The following table lists the internal fault messages and the probable maintenance response.
Note: “NO FAULTS” is enunciated for Level 2 Self-Test if no faults are present.
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本文链接地址：增强型近地警告系统 Enhanced Ground Proximity Warning 航线维护手册 Systems Line Maintenance Manual(24)
