TRACON intrafac coordination. Air carrier Y uncoord descent and radar vector airspace entry had less than standard separation from vip mlt X. System error.

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Attributes
ACN	230490
Time
Date	199301
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : lga
State Reference	NY
Altitude	msl bound lower : 11000 msl bound upper : 12000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : n90
Operator	other
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller military : 4 controller non radar : 2 controller radar : 5
ASRS Report	230490
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 19800 vertical : 1000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

Traffic management unit at the ny TRACON approved mlt X direct rbv direct ign landing swf. Mlt X had to go through 8 different sectors in order to short cut him to his destination. Mlt X was level at 17000, I had clearance down to 5000 with another controller. While mlt X was descending, I noticed air carrier Y come off of hpn. It appeared that air carrier Y would conflict with mlt X. I had the other controller turn air carrier Y north and climb to 16000. It all looked good until air carrier Y started descending out of 14300 for 12000 and turning wbound right at mlt X. I screamed out, what is air carrier Y doing? The aircraft were descending about the same rate. It appeared that the aircraft were going to come together. I told mlt X to descend immediately out of 12000, then I told him to increase out of 11000. At this time, I could do no more. The aircraft came entirely too close for comfort. After all, we are talking about vip mlt X. I still have not heard from the supervisor or controller why air carrier Y turned wbound and descended.

Original NASA ASRS Text

Title: TRACON INTRAFAC COORD. ACR Y UNCOORD DSCNT AND RADAR VECTOR AIRSPACE ENTRY HAD LTSS FROM VIP MLT X. SYS ERROR.

Narrative: TFC MGMNT UNIT AT THE NY TRACON APPROVED MLT X DIRECT RBV DIRECT IGN LNDG SWF. MLT X HAD TO GO THROUGH 8 DIFFERENT SECTORS IN ORDER TO SHORT CUT HIM TO HIS DEST. MLT X WAS LEVEL AT 17000, I HAD CLRNC DOWN TO 5000 WITH ANOTHER CTLR. WHILE MLT X WAS DSNDING, I NOTICED ACR Y COME OFF OF HPN. IT APPEARED THAT ACR Y WOULD CONFLICT WITH MLT X. I HAD THE OTHER CTLR TURN ACR Y N AND CLB TO 16000. IT ALL LOOKED GOOD UNTIL ACR Y STARTED DSNDING OUT OF 14300 FOR 12000 AND TURNING WBOUND RIGHT AT MLT X. I SCREAMED OUT, WHAT IS ACR Y DOING? THE ACFT WERE DSNDING ABOUT THE SAME RATE. IT APPEARED THAT THE ACFT WERE GOING TO COME TOGETHER. I TOLD MLT X TO DSND IMMEDIATELY OUT OF 12000, THEN I TOLD HIM TO INCREASE OUT OF 11000. AT THIS TIME, I COULD DO NO MORE. THE ACFT CAME ENTIRELY TOO CLOSE FOR COMFORT. AFTER ALL, WE ARE TALKING ABOUT VIP MLT X. I STILL HAVE NOT HEARD FROM THE SUPVR OR CTLR WHY ACR Y TURNED WBOUND AND DSNDED.

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.