N90 controller reports of a near midair collision due to a helicopter that isn't coordinated that de...

Narrative:

Aircraft X was released off bdr runway 6 (BridgeHaven6 SID); tower assigns 2;000 feet on departure. A VFR helicopter on a discrete code was east of bdr by approximately 5 miles; heading approximately 060; indicating 3;000 feet when I released aircraft X. At approx XX00Z; without coordination or warning; the VFR helicopter suddenly turned to a heading of approximately 330; towards jsd; and began descending. While this heading was sufficient to keep the helicopter out of bdr's class D airspace; it would put the helicopter only approximately 0.1 NM outside of it. More importantly; the helicopter was descending into the bdr departure corridor; just as aircraft X was becoming airborne. When aircraft X checked in on the frequency; I instructed him to maintain 2;000 feet and indent; at this point the helicopter was indicating approximately 2;500 feet just east of the departure corridor for bdr runway 6; and I was expecting jsd tower to instruct the helicopter to maintain that altitude until west of the departure corridor. Instead; the helicopter continued descending; again; no coordination; no point-out; and no communication from jsd tower; towards the departing aircraft X. I had to issue an evasive turn to the southeast (heading 120) to aircraft X and issue a safety alert. Targets merged 5 NM northeast of bdr (milum intersection); both aircraft indicating 2;000 feet. This is an on-going problem with jsd tower; whereby N90 controllers have to give evasive maneuvers to IFR aircraft under our control to avoid VFR helicopters under jsd tower's control. Recommend that jsd tower keep their traffic clear of arrival and/or departure corridors of the adjacent area airports (bdr; hvn; and oxc); and give vectors and/or altitudes to its helicopters to stay out of the way of N90 traffic. When either of these options are not possible or practical; jsd needs to coordinate with N90 isp sector (they can reach us on the land line) when they have to maneuver there helicopter traffic around or across arrival or departure corridors of the adjacent airports (bdr; hvn; and oxc) or when they become aware that one of their helicopters is in conflict with N90 traffic; in accordance with faao 7110.65 procedures.

Original NASA ASRS Text

Title: N90 Controller reports of a NMAC due to a helicopter that isn't coordinated that descends through the departure corridor of a close proximity airport.

Narrative: Aircraft X was released off BDR RWY 6 (BridgeHaven6 SID); Tower assigns 2;000 feet on departure. A VFR helicopter on a discrete code was east of BDR by approximately 5 miles; heading approximately 060; indicating 3;000 feet when I released Aircraft X. At approx XX00Z; without coordination or warning; the VFR helicopter suddenly turned to a heading of approximately 330; towards JSD; and began descending. While this heading was sufficient to keep the helicopter out of BDR's Class D airspace; it would put the helicopter only approximately 0.1 NM outside of it. More importantly; the helicopter was descending into the BDR departure corridor; just as Aircraft X was becoming airborne. When Aircraft X checked in on the frequency; I instructed him to maintain 2;000 feet and indent; at this point the helicopter was indicating approximately 2;500 feet just east of the departure corridor for BDR RWY 6; and I was expecting JSD Tower to instruct the helicopter to maintain that altitude until west of the departure corridor. Instead; the helicopter continued descending; again; no coordination; no point-out; and no communication from JSD Tower; towards the departing Aircraft X. I had to issue an evasive turn to the southeast (heading 120) to Aircraft X and issue a Safety Alert. Targets merged 5 NM northeast of BDR (MILUM intersection); both aircraft indicating 2;000 feet. This is an on-going problem with JSD Tower; whereby N90 controllers have to give evasive maneuvers to IFR aircraft under our control to avoid VFR helicopters under JSD Tower's control. Recommend that JSD Tower keep their traffic clear of arrival and/or departure corridors of the adjacent area airports (BDR; HVN; and OXC); and give vectors and/or altitudes to its helicopters to stay out of the way of N90 traffic. When either of these options are not possible or practical; JSD needs to coordinate with N90 ISP Sector (they can reach us on the land line) when they have to maneuver there helicopter traffic around or across arrival or departure corridors of the adjacent airports (BDR; HVN; and OXC) or when they become aware that one of their helicopters is in conflict with N90 traffic; in accordance with FAAO 7110.65 procedures.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1187886
Time
Date	201407
Local Time Of Day	1201-1800
Place
Locale Reference	BDR.Airport
State Reference	CT
Environment
Light	Daylight
Aircraft 1
Make Model Name	Light Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	SID BRIDGEHAVEN6
Flight Plan	IFR
Aircraft 2
Make Model Name	Helicopter
Flight Phase	Descent
Flight Plan	VFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 23
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

N90 controller reports of a near midair collision due to a helicopter that isn't coordinated that descends through the departure corridor of a close proximity airport.