Date: 201605
Local time of day: 1801-2400
Location: JFK.Airport, NY
Flight conditions: IMC
Weather elements / visibility: Windshear; Turbulence
Light: Daylight
Aircraft: B757-200
Operator: Air Carrier
Operating under: Part 129
Flight plan: IFR
Mission: Passenger
Flight phase: Initial Climb
Airspace: Class B JFK
ATC / advisory: Tower JFK
Second aircraft: B757-200
Reporter organization: Government
Reporter function: Local
Reporter qualification: Air Traffic Control Fully Certified
Human factors: Situational Awareness
Second reporter function: First Officer; Pilot Flying
Anomaly: ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Automation Aircraft Other Automation; Person Flight Crew; Person Air Traffic Control
When detected: In-flight
Result: Air Traffic Control Issued New Clearance; Flight Crew Executed Go Around / Missed Approach; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Became Reoriented
Contributing factors: Procedure; Weather; Human Factors
Primary problem: Ambiguous

Narrative: I was working Local 2 Runway 04L. I cleared a B752 Aircraft X for departure when I noticed another B752 Aircraft Y; going around Runway 04R. Aircraft Y was about 1.5 miles from the airport at about 500 feet. Local 1 instructed Aircraft Y to turn right heading 130. When Aircraft X lifted; I instructed Aircraft X to fly runway heading. I pointed out Aircraft X with LGA tower. LGA advised me that they would stop their departures. When Aircraft X was about half a mile off the departure end of Runway 04L; I noticed Aircraft Y on a left turn; right above Runway 04L at 2000 feet. I kept Aircraft X on runway heading stopped their climb to 1500. Local 1 again instructed Aircraft Y to turn right 130. When Aircraft X was about 2.5 miles off the departure end of Runway 04L; Aircraft Y was turning right to 130 degrees. Then I instructed Aircraft X to turn right 100. Aircraft Y advised tower that they were going around due to windshear. The safety issue was that turning left made the missed approach a factor with the departure. They had about 500 feet separation when Aircraft Y reappeared on the scope. On the 4's; we do not own the Belmont airspace which starts about two miles north east off the departure end of Runway 04L. We have to turn our departures right 100 or do a point out with LGA Tower in order to go runway heading.Recommendation: be able to use the Belmont airspace when we're departing Runway 04L and landing Runway 04R and 04L. Also if a pilot needs to execute a windshear escape they should advise the controller. We do understand that they must comply with the aircrafts command; but using; 'going around due to windshear' isn't clear enough for us to assume that they're executing a windshear escape. They must use the words windshear escape.


Second narrative: I was the pilot flying. We checked in with tower and they told us of a windshear reported; gain/loss of 15 knots reported by all aircraft around 700 Ft. The approach was normal and fully configured by 1500 MSL. Descending on ILS we broke out of weather around 800 ft MSL. I called the field in sight and continued approach. I had briefed that I would fly the approach at Vref+15 due to gusty winds. We received an aural windshear decreasing red alert and decreased aircraft performance at 500 ft MSL. I executed the escape maneuver/go around. We flew back into the weather and flew out of the windshear around 2000 ft MSL. Once I felt the aircraft was stable; I began to clean up the airplane and execute a normal go around. We contacted Tower and told them of the event and they vectored us back into the radar pattern and executed another approach to 04R and landed without another event.


Synopsis: JFK Local Controller and the three pilots aboard a B757 reported a windshear escape maneuver at 500 feet during approach to Runway 4R; causing a conflict with another B757 departing Runway 4L. The go-around crew did not respond initially to heading instructions exacerbating the situation and likely entering LGA airspace.