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Old 22nd Sep 2013, 04:44
  #1522 (permalink)  
Capn Bloggs
 
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Originally Posted by Sandilands Quote
The wording of the ATSB notification also supports the interpretation that the RA was, for whatever reason, only responded to by one of the jets involved in the incident. Without prejudice to anyone involved, there are other possible reasons as to why that may have been the case than TCAS equipment issues.
No, it's quite conceivable that only one TCAS alert was issued; the boxes talk to each other to determine the best course of action. Just because one says "climb!" the other one may not necessarily say "descend!", especially in this case where the clearance to climb by the lower aircraft appeared to have been reversed promptly by ATC. A330s, I imagine, don't immediately leap into a gut-busting, 20° nose-up lurch when the new altitude is selected.
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