<< >> NASA ASRS Report 592441, September 2003

Sct approach controller issued traffic and instructed a commuter flight to expedite descent. Traffic was later idented as a 'ghost' target.

Attributes
ACN	592441
Time
Date	200309
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 6000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	Saab-Scania Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 4 controller radar : 14 controller time certified in position1 : 6
ASRS Report	592441
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	other anomaly other
Independent Detector	atc equipment other atc equipment : radar other controllera other flight crewa
Resolutory Action	controller : issued advisory flight crew : took evasive action
Consequence	faa : investigated
Supplementary
Problem Areas	Navigational Facility
Primary Problem	Navigational Facility

Narrative:

I observed a beacon code and mode C altitude opposite direction and in conflict with my arrival aircraft X. I issued traffic and told aircraft X to 'expedite descent.' the conflicting target turned out to be a 'ghost' target from a departing aircraft Y.

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Original NASA ASRS Text

Title: SCT APCH CTLR ISSUED TFC AND INSTRUCTED A COMMUTER FLT TO EXPEDITE DSCNT. TFC WAS LATER IDENTED AS A 'GHOST' TARGET.

Narrative: I OBSERVED A BEACON CODE AND MODE C ALT OPPOSITE DIRECTION AND IN CONFLICT WITH MY ARR ACFT X. I ISSUED TFC AND TOLD ACFT X TO 'EXPEDITE DSCNT.' THE CONFLICTING TARGET TURNED OUT TO BE A 'GHOST' TARGET FROM A DEPARTING ACFT Y.

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.