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SF340 in IMC receives an RA and a subsequent turn from ATC towards the traffic that was 500 ft above them.
| Attributes | |
| ACN | 787296 |
| Time | |
| Date | 200805 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 787296 |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Miss Distance | horizontal : 0 vertical : 400 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
In the tops and IMC; noticed a TA that appeared to be moving toward us. Target was 500 ft above. As target closed it became an RA at about the same time ATC issued a clearance to turn toward the target. We declined the turn and turned about 10 degrees away from the target and we received the 'monitor vertical speed.' target passed without further incident. We told ATC we had an RA and the target passed as close as 400 ft directly above us as determined by the TCAS in 5 mi range. ATC said the target was VFR. We never saw the target; as we were IMC. ATC gave us a heading to return to. Nothing further. It would have lessened the stress if ATC would have pointed out the traffic so we knew she was considering it.
Original NASA ASRS Text
Title: SF340 IN IMC RECEIVES AN RA AND A SUBSEQUENT TURN FROM ATC TOWARDS THE TRAFFIC THAT WAS 500 FT ABOVE THEM.
Narrative: IN THE TOPS AND IMC; NOTICED A TA THAT APPEARED TO BE MOVING TOWARD US. TARGET WAS 500 FT ABOVE. AS TARGET CLOSED IT BECAME AN RA AT ABOUT THE SAME TIME ATC ISSUED A CLRNC TO TURN TOWARD THE TARGET. WE DECLINED THE TURN AND TURNED ABOUT 10 DEGS AWAY FROM THE TARGET AND WE RECEIVED THE 'MONITOR VERT SPD.' TARGET PASSED WITHOUT FURTHER INCIDENT. WE TOLD ATC WE HAD AN RA AND THE TARGET PASSED AS CLOSE AS 400 FT DIRECTLY ABOVE US AS DETERMINED BY THE TCAS IN 5 MI RANGE. ATC SAID THE TARGET WAS VFR. WE NEVER SAW THE TARGET; AS WE WERE IMC. ATC GAVE US A HDG TO RETURN TO. NOTHING FURTHER. IT WOULD HAVE LESSENED THE STRESS IF ATC WOULD HAVE POINTED OUT THE TFC SO WE KNEW SHE WAS CONSIDERING IT.
Data retrieved from NASA's ASRS site as of May 2009 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.