Narrative:

At FL410 we received a TCASII RA to descend at approximately 2000 FPM. At FL405 RA went away. ATC confirmed no traffic in our vicinity. There was no traffic symbol depicted on our TCASII display either. A few moments later we had another false TCASII alert, and ATC verified no traffic in area. After 3 false warnings in a few mins we turned off the TCASII equipment.

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Original NASA ASRS Text

Title: B767 CREW HAD FALSE TCASII RA IN ZLC CLASS A.

Narrative: AT FL410 WE RECEIVED A TCASII RA TO DSND AT APPROX 2000 FPM. AT FL405 RA WENT AWAY. ATC CONFIRMED NO TFC IN OUR VICINITY. THERE WAS NO TFC SYMBOL DEPICTED ON OUR TCASII DISPLAY EITHER. A FEW MOMENTS LATER WE HAD ANOTHER FALSE TCASII ALERT, AND ATC VERIFIED NO TFC IN AREA. AFTER 3 FALSE WARNINGS IN A FEW MINS WE TURNED OFF THE TCASII EQUIP.

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.