Air carrier X TCASII RA from false target.

Attributes
ACN	247279
Time
Date	199305
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 7600 msl bound upper : 8000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	other personnel other
Qualification	controller : radar
ASRS Report	247279
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Air carrier X advised it was reacting to a TCASII RA and descended to 7600 ft. There was no other aircraft within 3000 ft of this aircraft.

Original NASA ASRS Text

Title: ACR X TCASII RA FROM FALSE TARGET.

Narrative: ACR X ADVISED IT WAS REACTING TO A TCASII RA AND DSNDED TO 7600 FT. THERE WAS NO OTHER ACFT WITHIN 3000 FT OF THIS ACFT.

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.