TCAS Co-ordination?
My Airbus maintenance manual says that only one TCAS aircraft involved in conflict will be issued a maneouver order. The other TCAS aircraft will be ordered to 'stay put'. It depends on which aircraft identifies the conflict first. This makes sense, one guy getting DESCEND and the other guy getting MAINTAIN VERTICAL SPEED. Recent reports in the press imply otherwise. Is there a TCAS 'insider' out there who can confirm the RA co-ordination operation for me?