Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 5
Training / Qualification; Distraction; Situational Awareness; Confusion
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Separated Traffic; Air Traffic Control Provided Assistance
Procedure; Human Factors
Aircraft X was the lead aircraft cleared for the ILS to RWY04 at HOU. I vectored Aircraft Y; to intercept the localizer behind Aircraft X. There was a 30-40kt tailwind on final and the speed reduction I gave Aircraft Y was not enough. I eventually gave the pilot final approach speed which he was still decreasing distance between the aircraft. I eventually lost 4 miles; we just began the RECAT program at our facility which required me to maintain 4 miles both operating behind and on approach. I was under the impression that I only needed the 4 miles when the lead aircraft was over the landing threshold like before. Aircraft Y eventually reported Aircraft X in sight and I cleared him for the visual approach to follow.I have familiarized myself with the new wake turbulence minima and will continue to do so.
I90 Controller describes a loss of separation while trying to implement the RECAT wake turbulence minimums for the airport.