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Air carrier captain described a TCAS TA/RA event when they descended to an altitude separated by 500 ft from VFR traffic. The reporter suggested that ATC always provide IFR separation; i.e 1;000 ft and 3 miles.
| Attributes | |
| ACN | 995593 |
| Time | |
| Date | 201202 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Descent |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Plan | VFR |
| Person 1 | |
| Function | Pilot Not Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Conflict NMAC |
Narrative:
[We were] descending into our destination from 12;000 to 11;000 ft. At about 11;500 ft; got a TA followed by an RA at 11;300 ft for an aircraft below us at -300 ft on TCAS. Aircraft was supposed to be VFR at 10;500 ft. [It] passed under us at about 200 ft. Followed climb RA to 11;500 ft. Advised ATC and returned to 11;000 ft. Cause [was] approach descending us into known traffic with less than 1;000 ft separation. ATC should not descend aircraft into known VFR aircraft with less than 1;000 ft separation within 3 miles of our position.
Original NASA ASRS Text
Title: Air Carrier Captain described a TCAS TA/RA event when they descended to an altitude separated by 500 FT from VFR traffic. The reporter suggested that ATC always provide IFR separation; i.e 1;000 FT and 3 miles.
Narrative: [We were] descending into our destination from 12;000 to 11;000 FT. At about 11;500 FT; got a TA followed by an RA at 11;300 FT for an aircraft below us at -300 FT on TCAS. Aircraft was supposed to be VFR at 10;500 FT. [It] passed under us at about 200 FT. Followed CLIMB RA to 11;500 FT. Advised ATC and returned to 11;000 FT. Cause [was] Approach descending us into known traffic with less than 1;000 FT separation. ATC should not descend aircraft into known VFR aircraft with less than 1;000 FT separation within 3 miles of our position.
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.