E. Warning Generation and Inhibition
(1) Audio Output Alert outputs result in an audio voice warning unless inputs are invalid or one of the audio suppression discretes is active. The actual output message, or intended message during audio suppression, is sent to the warning lamp logic for proper output activation. The audio outputs consist of a transformer isolated 600 Ohm output. Aural warnings and their priority rate are as follows:
------------------------------------------------------------------------| RELATIVE | WARNING | POSSIBLE | LEGEND | | PRIORITY | CONDITION | MESSAGES | | |----------------------------------------------------------------------| | HIGHEST | Mode 1 Pull Up | PULL UP | PULL UP | |----------|--------------------------|-------------------|------------| | | Mode 2 Pull Up Preface | TERRAIN TERRAIN | PULL UP | |----------|--------------------------|-------------------|------------| | | Mode 2 Pull Up | PULL UP | PULL UP | |----------|--------------------------|-------------------|------------| | | Terrain Awareness Preface| TERRAIN AHEAD | PULL UP | | | | PULL UP | | |----------|--------------------------|-------------------|------------| | | Terrain Awareness Pull Up| TERRAIN AHEAD | PULL UP | | | | PULL UP | | |----------|--------------------------|-------------------|------------| | | Mode 2 Terrain | TERRAIN | GPWS | |----------|--------------------------|-------------------|------------| | * | Terrain Awareness Caution| TERRAIN AHEAD | GPWS | |----------|--------------------------|-------------------|------------| | * | Mode 4 Too Low Terrain | TOO LOW TERRAIN | GPWS | |----------|--------------------------|-------------------|------------| | | TCF Too Low Terrain | TOO LOW TERRAIN | GPWS | |----------|--------------------------|-------------------|------------| | * | Mode 4 Too Low Gear | TOO LOW GEAR | GPWS | |----------|--------------------------|-------------------|------------| | * | Mode 4 Too Low Flaps | TOO LOW FLAPS | GPWS | |----------|--------------------------|-------------------|------------| | * | Mode 1 Sinkrate | SINKRATE | GPWS | |----------|--------------------------|-------------------|------------| | * | Mode 3 Don't Sink | DON'T SINK | GPWS | |----------|--------------------------|-------------------|------------| | LOWEST * | Mode 5 Glide slope | GLIDE SLOPE | GPWS | ------------------------------------------------------------------------
R 1EFF : 106-149, 215-299, 301-399, 1 34-48-00Page A55 1 1 Config-1 Aug 01/05 1 1 1CES 1 * Allows interleaving of multiple alerts.
The voice warning circuits also contain logic elements which ensure
that:
- only one message at a time is output,
-higher priority messages interrupt lower priority messages except if interleaving is allowed (Ref. table above),
-
a triggered message is completed even when warning condition ceases,
-
a 0.75 second pause exists between warning messages.
(2) Alert discrete outputs Mode 5 GLIDE SLOPE message activates the alert lamp output (which illuminates GPWS amber legend). All other messages activate the warning lamp output (which illuminates PULL UP red legend). (Ref. Fig. 003)
(3) Control and Indicating R (Ref. Fig. 028)
(4) Inhibitions
(Ref. Fig. 005)
(a)
All audio inhibition:
-The INHIBIT ALL AUDIO discrete input controls the audio outputs as follows. When grounded, all voices are inhibited (not interrupted, all aural messages once started are finished). Visual and display indications are not affected. This input is used to manage the audio priority with other systems (FWS, PWS, TCAS).
(b)
Modes 1 to 5 inhibitions:
-The INHIBIT MODES 1 TO 5 discrete input controls the audio and visual outputs as follows. When grounded,this input always inhibits all GPWS aural and visual indications with the exception of Terrain Clearance Floor Alerts and Terrain Awareness caution and warnings. This input is wired to SYS pushbutton switch to manually inhibit GPWS Modes 1 to 5.
(c)
TAD and TCF inhibitions:
-The TERRAIN AWARENESS INHIBIT discrete input controls the audio, visual and display outputs as follows. When grounded, this input always inhibits TAD and TCF aural, visual and display indications. This input is wired to the TERR push-button switch to manually inhibit the TAD and TCF functions.
R 1EFF : 106-149, 215-299, 301-399, 1 34-48-00Page A56 1 1 Config-1 Aug 01/05 1 1 1CES 1
-When automatic deselection is activated TAD and TCF functions may also be inhibit automatically when the FMS aircraft position accuracy is not accurate enough. This is indicated to the crew by the automatic deselection of terrain display and the illumation of the TERR STBY memo on the ECAM display unit.
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