Narrative:

Aircraft required climb because turbulence. I climbed aircraft widebody transport X to FL330. Realized would not work with an small transport Y stopped aircraft at FL280 under FL290. Aircraft according to machine did not stop climb in time to maintain 1000 ft separation.

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Original NASA ASRS Text

Title: ARTCC RADAR CTLR TRIED TO STOP CLB ON WDB, BUT SEPARATION LOST WITH SMT WHEN WDB OVERSHOT ALT.

Narrative: ACFT REQUIRED CLB BECAUSE TURB. I CLBED ACFT WDB X TO FL330. REALIZED WOULD NOT WORK WITH AN SMT Y STOPPED ACFT AT FL280 UNDER FL290. ACFT ACCORDING TO MACHINE DID NOT STOP CLB IN TIME TO MAINTAIN 1000 FT SEPARATION.

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.