Hi I've had the 800/900 for a day, and when i first tried out the tcas it seemed to work fine. but now when i try it the ND display shows "TA only" even when it is set to TA/RA on the radio panel.Any ideasBen Rudder

It is normal on the ground. In the air if it is set to TA/RA it will be replaced by TFC on the ND.[h4]Best Wishes,Randy J. Smithhttp://www.precisionmanuals.com/images/forum/betaimg.jpgAMD 64 3200+ | ASUS KV8 DELUXE | GFORCE 5700 ULTRA @535/1000 | WD SATA 80 GIG | 512 DDR 400 |

Below approximately 1000' AGL (different threshold climbing vs. descending) RAs are inhibited, hence the "TA ONLY". TA aurals are inhibited below 500' AGL.If you got an RA "Climb, Climb" while sitting on the tarmac, what would you do? ;-)Lee Hetherington, PP-ASEL (KBED)