TRACON interfacility coordination aircraft Y uncoord unauthorized penetration of airspace had less than standard separation with air carrier X evasive action taken. System error.

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Attributes
ACN	229774
Time
Date	199212
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cat
State Reference	NJ
Altitude	msl bound lower : 3000 msl bound upper : 3000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : n90 tower : hou
Operator	common carrier : air carrier
Make Model Name	Light Transport, High Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 3
ASRS Report	229774
Person 2
Affiliation	government : faa
Function	controller : approach controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 1500 vertical : 100
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure
Situations
ATC Facility	other physical facility

Narrative:

I had an air carrier X on radar vectors for a visual approach runway 11 at ewr at 3000 MSL. Another controller working a combined position took radar on another aircraft Y from another facility. This was not SOP. Bad radar coverage caused aircraft Y ARTS IIIA tag to drop. Since other controller was busy due to combined position, the controller did not notice such. Aircraft Y tag re-acquired co-located with air carrier X on my frequency. Air carrier X took a sharp turn to avoid a midair. The supervisor called in sick which left the sector with 1 data aide, 7 fpl, 1 controller in charge. This is very understaffed and more controllers would have prevented this situation.

Original NASA ASRS Text

Title: TRACON INTERFAC COORD ACFT Y UNCOORD UNAUTH PENETRATION OF AIRSPACE HAD LTSS WITH ACR X EVASIVE ACTION TAKEN. SYS ERROR.

Narrative: I HAD AN ACR X ON RADAR VECTORS FOR A VISUAL APCH RWY 11 AT EWR AT 3000 MSL. ANOTHER CTLR WORKING A COMBINED POS TOOK RADAR ON ANOTHER ACFT Y FROM ANOTHER FACILITY. THIS WAS NOT SOP. BAD RADAR COVERAGE CAUSED ACFT Y ARTS IIIA TAG TO DROP. SINCE OTHER CTLR WAS BUSY DUE TO COMBINED POS, THE CTLR DID NOT NOTICE SUCH. ACFT Y TAG RE-ACQUIRED CO-LOCATED WITH ACR X ON MY FREQ. ACR X TOOK A SHARP TURN TO AVOID A MIDAIR. THE SUPVR CALLED IN SICK WHICH LEFT THE SECTOR WITH 1 DATA AIDE, 7 FPL, 1 CIC. THIS IS VERY UNDERSTAFFED AND MORE CTLRS WOULD HAVE PREVENTED THIS SIT.

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.