Narrative:

I was working both aircraft. The B757 also had company traffic. When he vacated FL230, I climbed aircraft #1. Within 20 seconds, I realized the BE20 was still traffic and told aircraft #1 to maintain FL210, but he climbed to FL213 before descending. The sector was not busy. I had had a bad cold and was on sick leave my 2 previous assigned shifts. In hindsight, I realize I was still run down and tired and should have taken another day to recover, but I did not want to be a 'malingerer.'

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Original NASA ASRS Text

Title: ARTCC RADAR CTLR ISSUES CLB CLRNC TO A B757, INCORRECTLY JUDGING SEPARATION BTWN ANOTHER COMPANY ACR AND AN ENRTE BE20. REALIZING A CONFLICT BTWN THE B757 AND BE20, THE CTLR DSNDS THE B757, BUT THE ERROR OCCURS.

Narrative: I WAS WORKING BOTH ACFT. THE B757 ALSO HAD COMPANY TFC. WHEN HE VACATED FL230, I CLBED ACFT #1. WITHIN 20 SECONDS, I REALIZED THE BE20 WAS STILL TFC AND TOLD ACFT #1 TO MAINTAIN FL210, BUT HE CLBED TO FL213 BEFORE DSNDING. THE SECTOR WAS NOT BUSY. I HAD HAD A BAD COLD AND WAS ON SICK LEAVE MY 2 PREVIOUS ASSIGNED SHIFTS. IN HINDSIGHT, I REALIZE I WAS STILL RUN DOWN AND TIRED AND SHOULD HAVE TAKEN ANOTHER DAY TO RECOVER, BUT I DID NOT WANT TO BE A 'MALINGERER.'

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.