Air carrier X TCASII RA from ghost target.

Attributes
ACN	247284
Time
Date	199305
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ord
State Reference	IL
Altitude	msl bound lower : 8800 msl bound upper : 8800
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	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	other personnel other
Qualification	controller : radar
ASRS Report	247284
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 12
Events
Anomaly	other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Air carrier X advised he was receiving an RA and asked what was going on. No other aircraft in his vicinity. His RA informed him of an aircraft 200 ft above him and to increase his rate of descent. No maneuver needed.

Original NASA ASRS Text

Title: ACR X TCASII RA FROM GHOST TARGET.

Narrative: ACR X ADVISED HE WAS RECEIVING AN RA AND ASKED WHAT WAS GOING ON. NO OTHER ACFT IN HIS VICINITY. HIS RA INFORMED HIM OF AN ACFT 200 FT ABOVE HIM AND TO INCREASE HIS RATE OF DSCNT. NO MANEUVER NEEDED.

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.