PPRuNe Forums - View Single Post - Airbus "TERRAIN…TERRAIN" & "TOO LOW, TERRAIN"
Old 3rd Aug 2014, 14:09
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vilas
 
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Something like TCAS TA and RA, in GPWS you get caution and warning. Cautions are " Don't sink, Terrain ahead, obstacle ahead and too low flaps. Warnings are executive commands like " Obstacle ahead pull up, Terrain, Terrain pull up and Terrain ahead pull up. With a caution you have 60 seconds to impact and with a warning it is 30 seconds to impact. With a caution it may be possible to silence the caution by corrective actions like too low flap means you have not selected flaps full. Either selecting full or correcting GPWS and MCDU to 3 will silence it. Similarly after take off or GA if you start descending, which you are not supposed to it will caution you "don't sink" which will stop when you stop descent. But when warning is issued it is too late and immediate GA with TOGA power and full back stick must be initiated.
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