Hi PMDG,all my compliments for the new 737 800/900... beautiful, stunning, striking and... very reliable starting from the first flight I've done.I have only a problem with the TCAS: I can see a yellow "TCAS OFF" message in the navigation display, and no idea about how to activate it.Can you help me?Andreahttp://www.precisionmanuals.com/images/forum/800driver.jpg

Firstly, read the TCAS manual. It comes with your product.Summarized, it will tell you something like this - Turn your transponder to TA or TA/RA and then hit the TFC button on the EFIS range knob.