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I90 controller reported a loss of class B separation due to the application of a confusing facility procedure.
| Attributes | |
| ACN | 1590000 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | I90.TRACON |
| State Reference | TX |
| Aircraft 1 | |
| Make Model Name | Small Transport Low Wing 2 Recip Eng |
| Flight Phase | Final Approach |
| Route In Use | Other Instrument Approach |
| Flight Plan | VFR |
| Aircraft 2 | |
| Make Model Name | Large Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Other Instrument Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 2 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft X was cleared for a practice ILS to 26R VFR because of a recent briefing at I90 where some of the staff support specialists determined that in order to sequence a VFR aircraft to iah and run aircraft beside them on final that is what had to be done. The aircraft went through the final and monitor north corrected it without issue. A supervisor came to me after it had been fixed and started asking me if I stopped aircraft Y's approach to which I answered in the negative due to the situation being resolved. Aircraft X then advised the local north controller that they couldn't complete the instrument approach and monitor north assigned them a VFR straight in. We lost the 1.5 mile class bravo separation but the aircrafts' courses never cross. Need national clarification on adjacent final separation when running a VFR straight in next to IFR traffic on a parallel runway.
Original NASA ASRS Text
Title: I90 Controller reported a loss of Class B separation due to the application of a confusing facility procedure.
Narrative: Aircraft X was cleared for a practice ILS to 26R VFR because of a recent briefing at I90 where some of the staff support specialists determined that in order to sequence a VFR aircraft to IAH and run aircraft beside them on final that is what had to be done. The aircraft went through the final and Monitor North corrected it without issue. A supervisor came to me after it had been fixed and started asking me if I stopped Aircraft Y's approach to which I answered in the negative due to the situation being resolved. Aircraft X then advised the Local north controller that they couldn't complete the instrument approach and monitor north assigned them a VFR straight in. We lost the 1.5 mile class bravo separation but the aircrafts' courses never cross. Need national clarification on adjacent final separation when running a VFR straight in next to IFR traffic on a parallel runway.
Data retrieved from NASA's ASRS site 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.