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Old 29th March 2013 | 00:14
  #41 (permalink)  
Capn Bloggs
 
Joined: Mar 2002
: ATPL
Posts: 9,226
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From: Seat 1A
Originally Posted by Bloggs
TCAS uses the transponder system. Transponder off? TCAS inop.
I was a bit flippant there. Here's what the 717 displays:

Transponder Setting/TCAS Status display

STBY / TCAS Off

Alt Off / TCAS Off

Alt On / TCAS STBY

TA / TA ONLY

TA/RA / Nothing
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