| Status |  Accident investigation report completed and information captured |
| Date | Thursday 16 May 1996 |
| Time | |
| Type |
 Tupolev Tu-154M |
| Operator | CSA Czech Airlines |
| Registration | OK-UCF |
| MSN | 89A-807 |
| Year of manufature | |
| Crew | Fatalities: 0 / Occupants: |
| Passengers | Fatalities: 0 / Occupants: |
| Total occupants | Fatalities: 0 / Occupants: |
| Aircraft damage | None |
| Location | 12 km N of Sigmaringen  Switzerland
|
| Phase | En route |
| Nature | Passenger - Scheduled |
| Departure Airport | Prague |
| Destination Airport | Zürich |
| Narrative | Crossair flight 571, a Saab 340 (HB-AKL) from Nürnberg to Zürich, nearly collided mid-air with CSA flight 584, a Tupolev Tu-154 (OK-UCF,) en route from Prague to Zürich. Separation was 500 ft horizontally and 100 ft vertically. CAUSE: The incident occurred because the air traffic controller cleared an aircraft to descend to a flight level that had not yet been vacated by an intersecting aircraft that was also descending. Contributing to the incident were: - Overlap of labels on the radar screen; - excessively high descent rate of the CSA aircraft; - low descent rate of the Crossair aircraft. |
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