Narrative:

I was working both northwest radar and the final position as traffic volume began to build. The cessna was on a visual approach clearance to runway 17L and switched to tower frequency. A military aircraft was being vectored for a practice ILS approach to 17L. During the cessna's descent into okc; a VFR aircraft from pwa airport departed underneath the cessna and was told to fly to the 'downtown' buildings and proceed on course. I was distracted by the VFR and very busy and turned the base leg of the military aircraft; not taking into account that the cessna had slowed significantly and still working the VFR through the final. I cleared the military aircraft for an ILS approach. I realized too late that the military aircraft was closing with the cessna; and turned the military aircraft west bound. Pwa airport and okc are very close together; with the okc final being only 1-2 miles east of pwa. At the present; VFR aircraft are being allowed to turn underneath our final; distracting controllers from their primary mission and causing nearly instantaneous work overload; RA's and ca's with aircraft on the 17R and 17L final. This has been reported in the past with no resolution. The current restriction for the pwa VFR aircraft is to stay at or below 2;700 MSL; while the MVA on our final is 3;000 MSL. I propose a restriction for all pwa VFR departures to stay clear of the okc final; by vectoring them away from the 17L and 17R final approach course and allow okc to work those aircraft to their destinations that are northeast; east or southeast of okc.

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Original NASA ASRS Text

Title: OKC Controller lost separation when distracted by a nearby VFR operation. The Controller suggests new VFR procedures to reduce these types of event.

Narrative: I was working both northwest RADAR and the Final position as traffic volume began to build. The Cessna was on a Visual Approach clearance to Runway 17L and switched to Tower frequency. A military aircraft was being vectored for a practice ILS approach to 17L. During the Cessna's descent into OKC; a VFR aircraft from PWA airport departed underneath the Cessna and was told to fly to the 'downtown' buildings and proceed on course. I was distracted by the VFR and very busy and turned the base leg of the military aircraft; not taking into account that the Cessna had slowed significantly and still working the VFR through the final. I cleared the military aircraft for an ILS approach. I realized too late that the military aircraft was closing with the Cessna; and turned the military aircraft west bound. PWA airport and OKC are very close together; with the OKC final being only 1-2 miles east of PWA. At the present; VFR aircraft are being allowed to turn underneath our final; distracting controllers from their primary mission and causing nearly instantaneous work overload; RA's and CA's with aircraft on the 17R and 17L final. This has been reported in the past with no resolution. The current restriction for the PWA VFR aircraft is to stay at or below 2;700 MSL; while the MVA on our final is 3;000 MSL. I propose a restriction for all PWA VFR departures to stay clear of the OKC final; by vectoring them away from the 17L and 17R final approach course and allow OKC to work those aircraft to their destinations that are northeast; east or southeast of OKC.

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.