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Tower controller described a recat wake turbulence event unclear if a loss of separation actually occurred; the reporter noting pressure to fully utilize the new reduced separation requirements.
| Attributes | |
| ACN | 1114937 |
| Time | |
| Date | 201309 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Local |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Deviation - Procedural Published Material / Policy |
Narrative:
Training a developmental during wake turbulance recat; a B757 was facing north on taxiway X. I instructed the developmental to clear the B757 for takeoff on runway xxr. The aircraft joined the runway at a speed that has not been the norm with the rest of the fleet. The B757 is a CAT 'D' and was following a CAT 'C' aircraft. I am not sure that separation was lost; but from the naked eye I believe that the aircraft did not have enough spacing with the previous aircraft. We were under pressure to fully utilize the wake recat reduced separation; and on the first day of working this position since the new changes; and the developmental's first day at this position as well; the timing required is still being understood on a learn-as-you-go basis. Recommendation is to allot for more time between departures until the separation and absolute timing is established.
Original NASA ASRS Text
Title: Tower Controller described a RECAT Wake Turbulence event unclear if a loss of separation actually occurred; the reporter noting pressure to fully utilize the new reduced separation requirements.
Narrative: Training a Developmental during Wake Turbulance RECAT; a B757 was facing north on Taxiway X. I instructed the Developmental to clear the B757 for takeoff on Runway XXR. The aircraft joined the runway at a speed that has not been the norm with the rest of the fleet. The B757 is a CAT 'D' and was following a CAT 'C' aircraft. I am not sure that separation was lost; but from the naked eye I believe that the aircraft did not have enough spacing with the previous aircraft. We were under pressure to fully utilize the Wake RECAT reduced separation; and on the first day of working this position since the new changes; and the Developmental's first day at this position as well; the timing required is still being understood on a learn-as-you-go basis. Recommendation is to allot for more time between departures until the separation and absolute timing is established.
Data retrieved from NASA's ASRS site as of July 2013 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.