Narrative:

My plan was to 1) use parallel vectors and climb, B) stop aircraft Y at FL210, let them pass, then climb. Aircraft Y was improperly assigned FL220.

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Original NASA ASRS Text

Title: ZOB ARTCC RADAR CTLR FAILED TO STOP A CLBING DC10 AT FL210 FOR TFC AT FL220.

Narrative: MY PLAN WAS TO 1) USE PARALLEL VECTORS AND CLB, B) STOP ACFT Y AT FL210, LET THEM PASS, THEN CLB. ACFT Y WAS IMPROPERLY ASSIGNED FL220.

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.