Narrative:

I was working a BE58 wbound climbing to 8000 ft. The previous controller had pointed him out to another sector, but on issuing an IFR clearance to the BE58, its tag dropped onto another controller's scope. He then descended the regional jet inbound to phl. The conflict alert never went off. Supplemental information from acn 615215: VFR aircraft pointed out approximately 10 mi northwest of ard VOR, full data block displayed. Controller requested climb, direct ptw, make aircraft IFR, pointout approved. Crj accepted from ZNY inbound to spuds. I instructed the crj to depart spuds heading 210 degrees, descend to 9000 ft. At spuds, entering my airspace, I instructed crj to descend to 7000 ft. No conflicting full data block was observed. Data block on BE58 had reverted to limited data block. A few mins later controller turned crj left. I initially observed no conflicting traffic. I then noticed limited data tag at 7000 ft wbound approximately 5 NM ahead of crj at 7000 ft. Crj turned to 140 degree heading, descended to 6000 ft to pass behind BE58. Crj advised of an 'RA' and was descending. No conflict alert had sounded.

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Original NASA ASRS Text

Title: PHL CTLR EXPERIENCED OPERROR WHEN DATA BLOCK INFO IS NOT DISPLAYED AND CONFLICTING INSTRUCTIONS ARE ISSUED AT 7000 FT, RESULTING IN A LOSS OF SEPARATION BTWN AN ENRTE BE58 AND A DSNDING CARJ.

Narrative: I WAS WORKING A BE58 WBOUND CLBING TO 8000 FT. THE PREVIOUS CTLR HAD POINTED HIM OUT TO ANOTHER SECTOR, BUT ON ISSUING AN IFR CLRNC TO THE BE58, ITS TAG DROPPED ONTO ANOTHER CTLR'S SCOPE. HE THEN DSNDED THE REGIONAL JET INBOUND TO PHL. THE CONFLICT ALERT NEVER WENT OFF. SUPPLEMENTAL INFO FROM ACN 615215: VFR ACFT POINTED OUT APPROX 10 MI NW OF ARD VOR, FULL DATA BLOCK DISPLAYED. CTLR REQUESTED CLB, DIRECT PTW, MAKE ACFT IFR, POINTOUT APPROVED. CRJ ACCEPTED FROM ZNY INBOUND TO SPUDS. I INSTRUCTED THE CRJ TO DEPART SPUDS HDG 210 DEGS, DSND TO 9000 FT. AT SPUDS, ENTERING MY AIRSPACE, I INSTRUCTED CRJ TO DSND TO 7000 FT. NO CONFLICTING FULL DATA BLOCK WAS OBSERVED. DATA BLOCK ON BE58 HAD REVERTED TO LIMITED DATA BLOCK. A FEW MINS LATER CTLR TURNED CRJ L. I INITIALLY OBSERVED NO CONFLICTING TFC. I THEN NOTICED LIMITED DATA TAG AT 7000 FT WBOUND APPROX 5 NM AHEAD OF CRJ AT 7000 FT. CRJ TURNED TO 140 DEG HDG, DSNDED TO 6000 FT TO PASS BEHIND BE58. CRJ ADVISED OF AN 'RA' AND WAS DSNDING. NO CONFLICT ALERT HAD SOUNDED.

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.