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Thread: UPS cargo crash near Birmingham AL
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Old 23rd Aug 2013, 17:13
  #648 (permalink)  
Airbubba
 
Join Date: Jun 2001
Location: Rockytop, Tennessee, USA
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I don't believe it looks at VS. Radio altimeter sees acft closing on the terrain. Acft could be going down or terrain could be rising.
It's just a dumb box.
I don't think the EGWPS is a dumb box, I believe it gets vertical speed information from the IRU's on the A306.
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