Narrative:

Aircraft X was on an ILS to runway 19R; next to him was aircraft Y on an ILS to runway 19C. One of these aircraft had the other in sight. Additionally a third aircraft was on an ILS approach to runway 12; he had no one in sight. When we called pct; they said they were providing visual separation. I did not see the 19R arrival until they were over the landing threshold. Even though we told pct this; they continued to run ILS approaches to all three runways.' separation was lost between the runway 12 and 19R aircraft. Pct approach and our management team downstairs were advised separation was lost by a supervisor. Later on after some investigation pct approach called and said we understand you want runway 12 back. I cannot see anywhere in the book that it says you can run ILS approaches to three runways on a converging course. What is the 19R pilot supposed to do if he has to break off the approach; the published missed goes through the runway 12 final. This is just another example of pct approach doing whatever they want without regards to safety in order to land runway 12. [I] recommend getting answers on whether you can run 3 ILS's to converging runways even if I can get visual prior to pct losing 3 miles. When it's hazy out there I don't want to have the responsibility when I can barely see the aircraft. We need to do a study to see the efficiency of landing runway 12 as compared to running traffic to runway's 19L; 19R; 19C and departing runway 30. Pct would still have 3 runways to land. We also need to set up some procedures for dealing with this issue. It has been the same thing for 6 years. Even though we [talk to them]; it seems to stop them for a couple of weeks before they go back to their old games.

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Original NASA ASRS Text

Title: IAD Controller voiced concern regarding PCT's practice of conducting ILS approaches to three runways simultaneously (Runway 19R; Runway 19C and Runway 12). The reporter questioned separation being used; adding new procedures need to be implemented.

Narrative: Aircraft X was on an ILS to Runway 19R; next to him was Aircraft Y on an ILS to Runway 19C. One of these aircraft had the other in sight. Additionally a third aircraft was on an ILS APCH to Runway 12; he had no one in sight. When we called PCT; they said they were providing visual separation. I did not see the 19R arrival until they were over the landing threshold. Even though we told PCT this; they continued to run ILS approaches to all three Runways.' Separation was lost between the Runway 12 and 19R aircraft. PCT Approach and our management team downstairs were advised separation was lost by a Supervisor. Later on after some investigation PCT Approach called and said we understand you want Runway 12 back. I cannot see anywhere in the book that it says you can run ILS approaches to three runways on a converging course. What is the 19R pilot supposed to do if he has to break off the approach; the published missed goes through the Runway 12 final. This is just another example of PCT Approach doing whatever they want without regards to safety in order to land Runway 12. [I] Recommend getting answers on whether you can run 3 ILS's to converging runways even if I can get visual prior to PCT losing 3 miles. When it's hazy out there I don't want to have the responsibility when I can barely see the aircraft. We need to do a study to see the efficiency of landing Runway 12 as compared to running traffic to Runway's 19L; 19R; 19C and departing Runway 30. PCT would still have 3 runways to land. We also need to set up some procedures for dealing with this issue. It has been the same thing for 6 years. Even though we [talk to them]; it seems to stop them for a couple of weeks before they go back to their old games.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.