-
the FAULT legend of the GPWS/TERR pushbutton switch goes off.
(b)
Level 2 Level 2, current faults, provides a listing of the internal and external faults currently detected by the Enhanced GPWC. Level 2 self-test is initiated by pressing the PULL UP/GPWS pushbutton switch within 3 seconds after the end of level 1 self-test.
(c)
Level 3 Level 3, Enhanced GPWS configuration, indicates the current configuration by listing the current hardware, software, data bases and program pin inputs detected by the Enhanced GPWC. This level is initiated by pressing the PULL UP/GPWS pushbutton switch when PRESS TO CONTINUE message is enunciated.
(d)
Level 4 Level 4, fault history, provides a historical record of both internal and external faults detected by the Enhanced GPWC. This level is initiated by pressing the PULL UP/GPWS pushbutton switch when PRESS TO CONTINUE message is enunciated.
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(e) Level 5 Level 5, warning history, provides a historical record of the warnings and cautions given by the Enhanced GPWC. This level is initiated by pressing the PULL UP/GPWS pushbutton switch when PRESS TO CONTINUE message is enunciated.
(f) Level 6 Level 6, discrete test, provides annunciation of discrete input transitions to be used for maintenance support. This level is initiated by pressing the PULL UP/GPWS pushbutton switch when PRESS TO CONTINUE message is enunciated.
(3) To speed up the navigation of self-test levels and information two types of cancel sequences are supported. Pressing and holding the PULL UP/GPWS pushbutton switch for less than 2 seconds is considered to be a short cancel. Pressing and holding the cockpit PULL UP/GPWS pushbutton switch for more than 2 seconds is considered to be a long cancel.
R **ON A/C 401-499,
R A. Self-Tests
R R R (1) On the ground only, the Enhanced GPWC provides self-test capability, both in flight and on ground, providing an indication of the ability of the Enhanced GPWC to perform its intended function.
R R R R R R R R (2) The Enhanced GPWC self-test is initiated by momentarily pressing PULL UP/GPWS pushbutton switches or via the MCDU on the ground. When activated by pressing the PULL UP/GPWS pushbutton switches, the self-test is enunciated, via the same audio system as the Enhanced GPWS alerts. This self-test can also be accessed via the headphone jack on the front panel of the Enhanced GPWC. The self-test is divided into six different levels to help with Enhanced GPWC testing and troubleshooting.
R R R R R R R R R R (a) Level 1 Level 1 (functional testing) provides an overview of the current operational functions selected and provides an indication of their operational status. Level 1 self-test sequence: - the FAULT legend of the GPWS/SYS pushbutton switch comes on, - the FAULT legend of the GPWS/TERR pushbutton switch comes on, - the GPWS legends of both PULL UP/GPWS pushbutton switches come on, - the GLIDE SLOPE audio phase is broadcast,
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R - the GPWS legends of both PULL UP/GPWS pushbutton switches go
R off,
R - the PULL UP legends of both PULL UP/GPWS pushbutton switches
R come on,
R - the PULL UP audio phase is broadcast,
R - the TERRAIN AHEAD PULL UP audio phase is broadcast,
R - the PULL UP legends of both PULL UP/GPWS pushbutton switches go
R off,
R - the ON legends of both TERR ON ND pushbutton switches come on,
R - the terrain self-test pattern is displayed on both NDs,
R (Ref. Fig. 030)
R - vocabulary sequence when long self-test initiated:
R
R SINK RATE
R PULL UP
R TERRAIN
R PULL UP
R DON'T SINK
R DON'T SINK
R TOO LOW TERRAIN
R TOO LOW GEAR
R TOO LOW FLAPS
R TOO LOW TERRAIN
R GLIDE SLOPE
R TOO LOW TERRAIN
R TERRAIN AHEAD
R TERRAIN AHEAD
R TERRAIN AHEAD PULL UP
R OBSTACLE AHEAD
R OBSTACLE AHEAD
R OBSTACLE AHEAD PULL UP
R
R - the terrain self-test pattern disappears.
R - the ON legends of both TERR ON ND pushbutton switches and the
R images displayed on both NDs revert to the configuration
R selected before the test,
R - the FAULT legend of the GPWS/SYS pushbutton switch goes off,
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