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Air carrier X TCASII RA with VFR aircraft evasive action descend had less than standard separation from BE58.
| Attributes | |
| ACN | 321481 |
| Time | |
| Date | 199511 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : aml |
| State Reference | VA |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Baron 58/58TC |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : approach |
| Qualification | controller : radar |
| Experience | controller radar : 17 |
| ASRS Report | 321481 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X inbound to iad advised of responding to a TCASII alert and was descending out of 10000 ft. I had a BE58 at 9000 ft who was converging. The aircraft came within about 200 ft and 1 mi. Both aircraft advised they had each other in sight. I observed a VFR code behind the air carrier X aircraft that he must have been avoiding. There were no other aircraft in the area.
Original NASA ASRS Text
Title: ACR X TCASII RA WITH VFR ACFT EVASIVE ACTION DSND HAD LTSS FROM BE58.
Narrative: ACR X INBOUND TO IAD ADVISED OF RESPONDING TO A TCASII ALERT AND WAS DSNDING OUT OF 10000 FT. I HAD A BE58 AT 9000 FT WHO WAS CONVERGING. THE ACFT CAME WITHIN ABOUT 200 FT AND 1 MI. BOTH ACFT ADVISED THEY HAD EACH OTHER IN SIGHT. I OBSERVED A VFR CODE BEHIND THE ACR X ACFT THAT HE MUST HAVE BEEN AVOIDING. THERE WERE NO OTHER ACFT IN THE AREA.
Data retrieved from NASA's ASRS site as of July 2007 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.