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ZNY controller experienced near midair collision at 12000 ft with descending IFR aircraft and maneuvering VFR aircraft.
| Attributes | |
| ACN | 678700 |
| Time | |
| Date | 200511 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : lrp.vortac |
| State Reference | PA |
| Altitude | msl single value : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller time certified in position1 : 15 |
| ASRS Report | 678700 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | atc equipment : conflict alert other controllera |
| Resolutory Action | controller : issued alert |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Unknown VFR orbiting around lrp VORTAC. Descent clearance given to air carrier X to 12000 ft. VFR showing 11900 ft climbing. I assumed continuing to 12500 ft VFR altitude. I stopped air carrier X at 12500 ft because VFR leveled at 12000 ft. Targets merged.
Original NASA ASRS Text
Title: ZNY CTLR EXPERIENCED NMAC AT 12000 FT WITH DSNDING IFR ACFT AND MANEUVERING VFR ACFT.
Narrative: UNKNOWN VFR ORBITING AROUND LRP VORTAC. DSCNT CLRNC GIVEN TO ACR X TO 12000 FT. VFR SHOWING 11900 FT CLBING. I ASSUMED CONTINUING TO 12500 FT VFR ALT. I STOPPED ACR X AT 12500 FT BECAUSE VFR LEVELED AT 12000 FT. TARGETS MERGED.
Data retrieved from NASA's ASRS site as of January 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.