TCAS Procedures
 

I was wondering if anyone can offer some insight into TCAS operation: What is the typical SOP for most crews to turn-off TCAS as to not get erroneous call-outs during approach and landing? Specifically, is it normal for an A320 crew to have their TCAS on inside a busy Bravo with high-update terminal radar and monitor controllers while on a simultaneous parallel ILS just outside the marker? Thanks.

TCAS switches automatically to TA only below 900ft RA. Therefore there is absolutely no reason to switch it off in a busy airspace. Quite the opposite to be honest, TCAS is after all there as a last line of defense against loss of separation and is therefore especially important in busy airspaces.

Not necessarily Denti

In Australia (land of bizarre airspace and procedures) it is in some companies SOP's that you go to TA ONLY when "Cleared Independent Visual Approach" into either 16 or 34 L or R into Sydney

If you're doing an ILS as per the OP's question, then our SOP's state to leave the TCAS in TA/RA mode.

DIVOSH!

Interesting, the only place where our SOPs demand a TA only setting is in case of performance restrictions like for example a OEI situation.

The aircraft remains in TA/RA mode though TCAS reverts to TA mode at a defined altitude "900 ft AGL stated below" the TCAS will not issue an RA to descend "thought it was 1500 agl" for obvious reasons. Also keep in mind generally aircraft are flying at slower speeds thus the resolution allows for greater distance though time is also calculate, as determined by the pilot(s) TA will allow for the pilot to make a decision and communicate intentions.