<< >> NASA ASRS Report 533067, December 2001

ZAU and C90 incorrectly xfer communication and radar between a departing E145 and B737 which conflict at 13000 ft.

Attributes
ACN	533067
Time
Date	200112
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl bound lower : 12000 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zau.artcc tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	533067
Person 2
Affiliation	government : faa
Function	controller : departure
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation other anomaly other other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 7200 vertical : 400
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

Aircraft X and aircraft Y departed ord. Aircraft X was a non tracked target and was directly on top of aircraft Y. Due to miscom with C90 (ord approach), the wrong target was idented. Aircraft X, at 12000 ft, was climbed to 15000 ft. I, as the radar controller, was unaware of aircraft Y being directly on top of aircraft X. Shortly after the clearance, descended back to 12000 ft. Aircraft Y turned to a heading of 120 degrees for the traffic. I then reclred aircraft Y to 12000 ft and turned the aircraft nebound. Aircraft Y was idented and climbed to 14000 ft. Aircraft X was eventually climbed to FL230 and put back on course and handed off to the high sector.

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Original NASA ASRS Text

Title: ZAU AND C90 INCORRECTLY XFER COM AND RADAR BTWN A DEPARTING E145 AND B737 WHICH CONFLICT AT 13000 FT.

Narrative: ACFT X AND ACFT Y DEPARTED ORD. ACFT X WAS A NON TRACKED TARGET AND WAS DIRECTLY ON TOP OF ACFT Y. DUE TO MISCOM WITH C90 (ORD APCH), THE WRONG TARGET WAS IDENTED. ACFT X, AT 12000 FT, WAS CLBED TO 15000 FT. I, AS THE RADAR CTLR, WAS UNAWARE OF ACFT Y BEING DIRECTLY ON TOP OF ACFT X. SHORTLY AFTER THE CLRNC, DSNDED BACK TO 12000 FT. ACFT Y TURNED TO A HDG OF 120 DEGS FOR THE TFC. I THEN RECLRED ACFT Y TO 12000 FT AND TURNED THE ACFT NEBOUND. ACFT Y WAS IDENTED AND CLBED TO 14000 FT. ACFT X WAS EVENTUALLY CLBED TO FL230 AND PUT BACK ON COURSE AND HANDED OFF TO THE HIGH SECTOR.

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.