Narrative:

I forgot about air carrier Y at FL290 and descended air carrier X down to FL240. Air carrier X was 4 mi south of air carrier Y.

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Original NASA ASRS Text

Title: LOSS OF SEPARATION SIT WHEN RPTR FORGOT ACR Y AT FL290 AND DSNDED ACR X FROM FL310 TO FL240 WITHOUT APPROPRIATE LATERAL SEPARATION.

Narrative: I FORGOT ABOUT ACR Y AT FL290 AND DSNDED ACR X DOWN TO FL240. ACR X WAS 4 MI S OF ACR Y.

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.