N90 TRACON approach controller incorrectly idents traffic a BA41 is to follow. As the BA41 turns to follow traffic, approach controller advises that he issued the wrong traffic, requiring the BA41 to make an evasive maneuver to follow intended traffic.

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Attributes
ACN	420652
Time
Date	199811
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : jfk airport : jfk
State Reference	NY
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	cruise other descent : approach descent other
Route In Use	approach : visual enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Light Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	descent : approach descent other
Route In Use	approach : straight in arrival 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 : 200 flight time total : 7000 flight time type : 1500
ASRS Report	420652
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 9000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were on a 10 mi right base for runway 4R at jfk. It was my leg. Approach control gave us a traffic call 'learjet at 1-2 O'clock. We called him in sight and were cleared for the visual approach runway 4R following the learjet. The aircraft my first officer and I were looking at was at 1-2 O'clock and about 5-6 mi so I turned right to a dogleg (heading about 310 degrees). Just prior to reaching the final approach course, approach control asked if we had the learjet in sight. We replied we did. Approach control then informed us the lear was at our 10 O'clock position and 2 or 3 mi and we were cutting him off. The tcasi was now showing that target (we had really not looked at tcasi up to that point thinking we had the lear in sight well in front of us) 200 ft high at 10 O'clock. We turned left to get behind the lear and continued our descent to stay below him. We never saw the learjet but estimate we came within 1-2 mi and 300 ft vertically from him. Once we were well clear of the lear, approach control allowed us to turn back toward the runway to continue the approach and remarked, 'sorry about that, I may have given you the wrong clock position.' no further action was taken and we landed uneventfully. A note on the TCAS: our system is tcasi and we never received a TA.

Original NASA ASRS Text

Title: N90 TRACON APCH CTLR INCORRECTLY IDENTS TFC A BA41 IS TO FOLLOW. AS THE BA41 TURNS TO FOLLOW TFC, APCH CTLR ADVISES THAT HE ISSUED THE WRONG TFC, REQUIRING THE BA41 TO MAKE AN EVASIVE MANEUVER TO FOLLOW INTENDED TFC.

Narrative: WE WERE ON A 10 MI R BASE FOR RWY 4R AT JFK. IT WAS MY LEG. APCH CTL GAVE US A TFC CALL 'LEARJET AT 1-2 O'CLOCK. WE CALLED HIM IN SIGHT AND WERE CLRED FOR THE VISUAL APCH RWY 4R FOLLOWING THE LEARJET. THE ACFT MY FO AND I WERE LOOKING AT WAS AT 1-2 O'CLOCK AND ABOUT 5-6 MI SO I TURNED R TO A DOGLEG (HDG ABOUT 310 DEGS). JUST PRIOR TO REACHING THE FINAL APCH COURSE, APCH CTL ASKED IF WE HAD THE LEARJET IN SIGHT. WE REPLIED WE DID. APCH CTL THEN INFORMED US THE LEAR WAS AT OUR 10 O'CLOCK POS AND 2 OR 3 MI AND WE WERE CUTTING HIM OFF. THE TCASI WAS NOW SHOWING THAT TARGET (WE HAD REALLY NOT LOOKED AT TCASI UP TO THAT POINT THINKING WE HAD THE LEAR IN SIGHT WELL IN FRONT OF US) 200 FT HIGH AT 10 O'CLOCK. WE TURNED L TO GET BEHIND THE LEAR AND CONTINUED OUR DSCNT TO STAY BELOW HIM. WE NEVER SAW THE LEARJET BUT ESTIMATE WE CAME WITHIN 1-2 MI AND 300 FT VERTLY FROM HIM. ONCE WE WERE WELL CLR OF THE LEAR, APCH CTL ALLOWED US TO TURN BACK TOWARD THE RWY TO CONTINUE THE APCH AND REMARKED, 'SORRY ABOUT THAT, I MAY HAVE GIVEN YOU THE WRONG CLOCK POS.' NO FURTHER ACTION WAS TAKEN AND WE LANDED UNEVENTFULLY. A NOTE ON THE TCAS: OUR SYS IS TCASI AND WE NEVER RECEIVED A TA.

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.