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TCASII RA to VFR traffic caused flight crew to descend from assigned altitude causing less than standard separation from second IFR aircraft.
| Attributes | |
| ACN | 321660 |
| Time | |
| Date | 199511 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : iad |
| State Reference | DC |
| Altitude | msl bound lower : 9200 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Baron 55/Cochise |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | oversight : coordinator |
| Experience | controller military : 3 controller radar : 8 |
| ASRS Report | 321660 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
I was working as a traffic management coordinator managing mar holding at the west arrival sector. The controller was busy, working 12-14 aircraft, arrs as well as overflts. Air carrier X was on vectors level at 10000 ft. Air carrier X was northbound and issued a turn to the east. There was a baron east of air carrier X northbound. There was a VFR untracked target at 10500 ft sbound north of the air carrier X. After air carrier X was established in its turn, he advised he was descending for an RA. This put him into a direct conflict with the 9000 ft IFR traffic. The closest point of approach was 1 mi and 200 ft.
Original NASA ASRS Text
Title: TCASII RA TO VFR TFC CAUSED FLC TO DSND FROM ASSIGNED ALT CAUSING LTSS FROM SECOND IFR ACFT.
Narrative: I WAS WORKING AS A TFC MGMNT COORDINATOR MANAGING MAR HOLDING AT THE W ARR SECTOR. THE CTLR WAS BUSY, WORKING 12-14 ACFT, ARRS AS WELL AS OVERFLTS. ACR X WAS ON VECTORS LEVEL AT 10000 FT. ACR X WAS NBOUND AND ISSUED A TURN TO THE E. THERE WAS A BARON E OF ACR X NBOUND. THERE WAS A VFR UNTRACKED TARGET AT 10500 FT SBOUND N OF THE ACR X. AFTER ACR X WAS ESTABLISHED IN ITS TURN, HE ADVISED HE WAS DSNDING FOR AN RA. THIS PUT HIM INTO A DIRECT CONFLICT WITH THE 9000 FT IFR TFC. THE CLOSEST POINT OF APCH WAS 1 MI AND 200 FT.
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.