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ZID developmental controller described operational error at approximately FL300; during crossing traffic/descent event; claiming mode-C altitude swap as a contributing factor.
| Attributes | |
| ACN | 819995 |
| Time | |
| Date | 200901 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | PXV.VORTAC |
| State Reference | IN |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Person 1 | |
| Function | Enroute |
| Qualification | Air Traffic Control Developmental |
| Person 2 | |
| Function | Enroute |
| Qualification | Air Traffic Control Fully Certified |
| Experience | Air Traffic Control Military 3 Air Traffic Control Non Radar 18 Air Traffic Control Radar 17 |
| Events | |
| Anomaly | ATC Issue All Types Conflict Airborne Conflict |
Narrative:
Aircraft #1 was westbound FL300; aircraft #2 northeastbound at FL310 given descent to FL240 crossing sector boundary about 20 miles southeast pxv VORTAC. Aircraft had mode C swap with another aircraft at FL290 over pxv. Immediately after; conflict alert went off between aircraft #1 and aircraft #2 and my trainer took over frequencies and put on headings.
Original NASA ASRS Text
Title: ZID Developmental Controller described operational error at approximately FL300; during crossing traffic/descent event; claiming Mode-C altitude swap as a contributing factor.
Narrative: Aircraft #1 was westbound FL300; Aircraft #2 northeastbound at FL310 given descent to FL240 crossing sector boundary about 20 miles southeast PXV VORTAC. Aircraft had Mode C swap with another aircraft at FL290 over PXV. Immediately after; Conflict Alert went off between Aircraft #1 and Aircraft #2 and my trainer took over frequencies and put on headings.
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.