Small Transport; Low Wing; 2 Recip Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 2
Training / Qualification; Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance
Company Policy; Procedure
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.
I90 Controller reported a loss of Class B separation due to the application of a confusing facility procedure.