TCASII false target indication.

Attributes
ACN	176652
Time
Date	199104
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
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	controller : approach
Qualification	controller : radar
Experience	controller radar : 6
ASRS Report	176652
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier X was at 8000' 5 southwest of ord. He stated his TCAS showed traffic at 3 mi opp direction, same altitude. Controller advised pilot there was no traffic. Pilot questioned the controller's advisory. The controller then advised the pilot his closest traffic 10 O'clock, 10 mi at 7000'. No further incident.

Original NASA ASRS Text

Title: TCASII FALSE TARGET INDICATION.

Narrative: ACR X WAS AT 8000' 5 SW OF ORD. HE STATED HIS TCAS SHOWED TFC AT 3 MI OPP DIRECTION, SAME ALT. CTLR ADVISED PLT THERE WAS NO TFC. PLT QUESTIONED THE CTLR'S ADVISORY. THE CTLR THEN ADVISED THE PLT HIS CLOSEST TFC 10 O'CLOCK, 10 MI AT 7000'. NO FURTHER INCIDENT.

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.