Narrative:

Conflict alert advisory activates on aircraft in level flight and distracts controllers. Incident #1 MTR X in MOA between 11000 ft and FL230 and an overflt at FL330. #2 MTR Y in MOA between 11000 ft and FL230 and an overflt at FL390. #3 small transport jet Z level FL260 and medium large transport a FL285 climbing to FL310. Medium large transport a has an 80 KT overtake, however, conflict alert activates after aircraft have been separated vertically. This problem started with the latest change in computer patches. Before this last modification conflict alert was much more reliable.

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Original NASA ASRS Text

Title: ARTCC CTLR COMPLAINS ABOUT NUISANCE CONFLICT ALERT ALARMS WHERE OTHER ACFT ARE NO FACTOR.

Narrative: CONFLICT ALERT ADVISORY ACTIVATES ON ACFT IN LEVEL FLT AND DISTRACTS CTLRS. INCIDENT #1 MTR X IN MOA BTWN 11000 FT AND FL230 AND AN OVERFLT AT FL330. #2 MTR Y IN MOA BTWN 11000 FT AND FL230 AND AN OVERFLT AT FL390. #3 SMT JET Z LEVEL FL260 AND MLG A FL285 CLBING TO FL310. MLG A HAS AN 80 KT OVERTAKE, HOWEVER, CONFLICT ALERT ACTIVATES AFTER ACFT HAVE BEEN SEPARATED VERTICALLY. THIS PROB STARTED WITH THE LATEST CHANGE IN COMPUTER PATCHES. BEFORE THIS LAST MODIFICATION CONFLICT ALERT WAS MUCH MORE RELIABLE.

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.