Narrative:

False safety logic alert. An A320 target was generated on runway 25R at B6 and triggered an alert (warning runway 25R occupied) with another air carrier 3;000 ft into his departure roll. It was too late to cancel and miss the false target at B6; I looked for a vehicle or possibly a taxiing aircraft that may have wondered onto the runway but did not see anything. Not that it would have mattered because the air carrier could never have become airborne nor could he have stopped before B6. The target reappeared for a few more swipes and then disappeared. It turned out that the A320 pushed back off their gate about 10-15 minutes later. Their gate is not far from B6.

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Original NASA ASRS Text

Title: LAX Controller described an equipment safety alert event received after an aircraft started the takeoff roll; noting the aircraft call sign listed in the alert was that of an aircraft parked in a near by gate.

Narrative: False safety logic alert. An A320 target was generated on Runway 25R at B6 and triggered an alert (warning Runway 25R occupied) with another Air Carrier 3;000 FT into his departure roll. It was too late to cancel and miss the false target at B6; I looked for a vehicle or possibly a taxiing aircraft that may have wondered onto the runway but did not see anything. Not that it would have mattered because the Air Carrier could never have become airborne nor could he have stopped before B6. The target reappeared for a few more swipes and then disappeared. It turned out that the A320 pushed back off their gate about 10-15 minutes later. Their gate is not far from B6.

Data retrieved from NASA's ASRS site as of April 2012 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.