Medium Large Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 23.5
Communication Breakdown; Confusion; Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Air Traffic Control Separated Traffic
Airspace Structure; Chart Or Publication; Human Factors; Procedure
JFK was landing Runway 4R and departing Runway 4L. On this flow arrivals from the northwest arrive north of JFK and are vectored to the east and south of the airport for their arrival. 4L departures depart and turn to a 100 degree heading to avoid LGA airport operations. Aircraft X departed and according to the summary was climbed to 7;000 and on a 100 degree heading. Aircraft Y was on a 120 degree heading north of JFK descending to 8;000. Aircraft X was instructed by me to turn right to a 180 degree heading and aircraft Y was instructed by the arrival controller to turn to a 220 degree heading. Aircraft X was instructed to climb to 12;000 and turned to a heading of 220 degrees. Aircraft Y was advised to maintain 9;000 and turn left heading 180 degrees. Separation was lost when aircraft X climbed through 9;000.I believe the arrival controller was busy and on our normal procedures he should have flown over JFK and turned to a 180 degree heading and descended to 8;000; but because of volume he took aircraft Y out east for more room as he was busy. I believed he would continue descending southeast bound and I would climb south of his arrival. This is not our normal procedure. So I believe we coordinated something and we both believed we were on the same page; but as we now can see the coordination and communication was not complete. Or not perfectly understood by both controllers.Better communication and coordination. We all must know the exact plan. Partial or misunderstood coordination is no coordination. We all must be on the same page especially when we are deviating off normal procedures. If we are doing something outside normal procedures we must [be] absolutely [certain] we know what each other are doing with our traffic.
Two N90 TRACON Controllers vectored descending/climbing aircraft for separation. One Controller believed the other Controller's aircraft would continue on a different heading than it did. The aircraft passed with less than required separation.