 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
I90 controller describes a loss of separation while trying to implement the recat wake turbulence minimums for the airport.
| Attributes | |
| ACN | 1227079 |
| Time | |
| Date | 201412 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | I90.TRACON |
| State Reference | TX |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Large Transport |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Medium Transport Low Wing 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Final Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Approach |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Time Certified In Pos 1 (yrs) 5 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence |
Narrative:
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.
Original NASA ASRS Text
Title: I90 Controller describes a loss of separation while trying to implement the RECAT wake turbulence minimums for the airport.
Narrative: 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.
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.