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ZID associate controller described operational error event when mode C altitude swap occurred and controller providing OJT failed to note developing situation; corrective action issued was too late to maintain separation.
| Attributes | |
| ACN | 827585 |
| Time | |
| Date | 200901 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | PXV.VORTAC |
| State Reference | IN |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute Trainee |
| Qualification | Air Traffic Control Developmental |
| Experience | Air Traffic Control Radar 1 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
| Miss Distance | Horizontal 18000 Vertical 500 |
Narrative:
Operational error during radar training. Mode C swap took place approximately 15 seconds before conflict alert was activated. Radar trainer took control and issued vectors. Separation was lost. Air carrier Y was given descent from FL310 to FL240 landing ind. Air carrier X was cruising at FL300 enroute to tul. Mode C swap took place after clearance to air carrier Y but before conflict alert between air carrier X and air carrier Y. There were many aircraft over pxv with data block overlap.
Original NASA ASRS Text
Title: ZID Associate Controller described operational error event when Mode C altitude swap occurred and Controller providing OJT failed to note developing situation; corrective action issued was too late to maintain separation.
Narrative: Operational error during radar training. Mode C swap took place approximately 15 seconds before conflict alert was activated. Radar Trainer took control and issued vectors. Separation was lost. Air Carrier Y was given descent from FL310 to FL240 landing IND. Air Carrier X was cruising at FL300 enroute to TUL. Mode C swap took place after clearance to Air Carrier Y but before conflict alert between Air Carrier X and Air Carrier Y. There were many aircraft over PXV with data block overlap.
Data retrieved from NASA's ASRS site as of April 2012 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.