An air carrier was cleared up into the airspace of another aircraft.

Attributes
ACN	253545
Time
Date	199310
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : yyr
State Reference	NF
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : czqm tower : teb
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 160 flight time total : 19000
ASRS Report	253545
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

ATC inadvertently cleared a flight 2000 ft below us to our altitude. We were alerted of this by our TCASII. Apparently there was an overlap of targets on the radar (ATC) screen.

Original NASA ASRS Text

Title: AN ACR WAS CLRED UP INTO THE AIRSPACE OF ANOTHER ACFT.

Narrative: ATC INADVERTENTLY CLRED A FLT 2000 FT BELOW US TO OUR ALT. WE WERE ALERTED OF THIS BY OUR TCASII. APPARENTLY THERE WAS AN OVERLAP OF TARGETS ON THE RADAR (ATC) SCREEN.

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.