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A ZKC controller described a TCAS RA event. The level traffic received a command to descend when traffic was 1;000 feet below. The the command was ignored because of the observed traffic.
| Attributes | |
| ACN | 913403 |
| Time | |
| Date | 201010 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZKC.ARTCC |
| State Reference | KS |
| Aircraft 1 | |
| Make Model Name | B767-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Route In Use | None |
| Flight Plan | IFR |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
A B767 transmitted that they had gotten an RA to descend; 1;000 ft below was another air carrier in opposite direction. I advised the B767 of the traffic below him and told him there was no traffic at his altitude. The B767 transmitted that he had already observed the other air carrier visually and that he was still getting the RA to descend. The B767 never did descend. Had the B767 descended; there may have been a mid-air collision. If the B767 had been IMC or had not seen the other aircraft visually; the B767 probably would have complied with the RA. Recommend fixing TCAS RA software.
Original NASA ASRS Text
Title: A ZKC Controller described a TCAS RA event. The level traffic received a command to descend when traffic was 1;000 feet below. The the command was ignored because of the observed traffic.
Narrative: A B767 transmitted that they had gotten an RA to descend; 1;000 FT below was another Air Carrier in opposite direction. I advised the B767 of the traffic below him and told him there was no traffic at his altitude. The B767 transmitted that he had already observed the other Air Carrier visually and that he was still getting the RA to descend. The B767 never did descend. Had the B767 descended; there may have been a mid-air collision. If the B767 had been IMC or had not seen the other aircraft visually; the B767 probably would have complied with the RA. Recommend fixing TCAS RA software.
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.