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Enroute controller described a loss of separation event claiming 'mental fatigue' was a contributing factor.
| Attributes | |
| ACN | 1028753 |
| Time | |
| Date | 201208 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
I had descended the E145 to FL280 a few minutes later the conflict alert activated. I had assumed the E145 was inbound to ZZZ on the new arrival route that had just been implemented. However; the aircraft was moving to the south and head on with a B737 at FL290. Once I had realized the conflict alert was authentic; I told the E145 to expedite his descent and turned both aircraft 30 degrees right. At the same time; the B737 responded to a TCAS and climbed. As a result no text book definition of separation lost. I believe the cause of this situation is the prolonged levels time on position and of extensive workload; thence resulting in mental fatigue.
Original NASA ASRS Text
Title: Enroute Controller described a loss of separation event claiming 'mental fatigue' was a contributing factor.
Narrative: I had descended the E145 to FL280 a few minutes later the Conflict Alert activated. I had assumed the E145 was inbound to ZZZ on the new arrival route that had just been implemented. However; the aircraft was moving to the south and head on with a B737 at FL290. Once I had realized the Conflict Alert was authentic; I told the E145 to expedite his descent and turned both aircraft 30 degrees right. At the same time; the B737 responded to a TCAS and climbed. As a result no text book definition of separation lost. I believe the cause of this situation is the prolonged levels time on position and of extensive workload; thence resulting in mental fatigue.
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.