3-6-4. SAFETY LOGIC ALERT RESPONSES

3-6-4. SAFETY LOGIC ALERT RESPONSES

When the system generates an alert, the controller must immediately assess the situation visually and as presented on the ASDE system display, then take appropriate action as follows:

1. When an arrival aircraft (still airborne, prior to the landing threshold) activates a warning alert, the controller must issue go-around instructions. (Exception: Alerts involving known formation flights, as they cross the landing threshold, may be disregarded if all other factors are acceptable.)

   NOTE: The intent of this paragraph is that an aircraft does not land on the runway, on that approach, when the safety logic system has generated a warning alert. A side-step maneuver or circle to land on another runway satisfies this requirement.

   • REFERENCE
   • FAA Order JO 7110.65, Para 3-8-1, Sequence/Spacing Application.
   • FAA Order JO 7110.65, Para 3-9-6, Same Runway Separation.
   • FAA Order JO 7110.65, Para 3-10-3, Same Runway Separation.
   • P/CG Term - Go Around.
2. When an arrival aircraft activates a warning alert to a taxiway, the controller must issue go-around instructions.
3. When two arrival aircraft, or an arrival aircraft and a departing aircraft activate an alert, the controller will issue go-around instructions or take appropriate action to ensure intersecting runway separation is maintained.
   • REFERENCE
   • FAA Order JO 7110.65, Para 3-9-8, Intersecting Runway/Intersecting Flight Path Operations.
   • FAA Order JO 7110.65, Para 3-10-4, Intersecting Runway/Intersecting Flight Path Separation.
4. For other safety logic system alerts, issue instructions/clearances based on good judgment and evaluation of the situation at hand.