When an aircraft is responding to an RA, the controller is not responsible for separation ________________.

• A. The controller is not responsible for separation between that aircraft responding to the RA and any other aircraft
• B. The controller is responsible for all traffic during the RA
• C. Separation is automatic for RA traffic
• D. Controllers must re-sequence RA traffic after the RA ends

Answer: (A)

When a Resolution Advisory is active, the affected pilot must follow the TCAS guidance to avoid collision, and those maneuvers are executed by the pilot without waiting for ATC to direct every change. Because the RA can require abrupt, non-coordinated moves, the controller cannot guarantee or manage separation between the aircraft responding to the RA and other traffic. The controller continues to handle other traffic and provide standard separation for non-RA aircraft, but the RA-affected aircraft’s separation relative to others is the pilot’s responsibility during the advisory. After the RA ends, normal sequencing can be resumed, but during the RA the controller does not assume responsibility for separating the RA traffic from all other aircraft.