Narrative:

ZID was non radar, with a limited data block at FL280 intercepted a tracked target at FL280. Supplemental information from acn 490369: ZID lost communications and radar. Multiple beacon codes intruded on airspace, with no flight plan information.

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Original NASA ASRS Text

Title: ZID RADAR CTLR MAY HAVE ALLOWED AN ACFT WITH A LIMITED DATA TAG TO CONFLICT WITH ANOTHER ACFT AT THE SAME ALT.

Narrative: ZID WAS NON RADAR, WITH A LIMITED DATA BLOCK AT FL280 INTERCEPTED A TRACKED TARGET AT FL280. SUPPLEMENTAL INFO FROM ACN 490369: ZID LOST COMS AND RADAR. MULTIPLE BEACON CODES INTRUDED ON AIRSPACE, WITH NO FLT PLAN INFO.

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.