ZNY controller experienced operational error at FL370 with 1 aircraft on ZBW frequency.

Attributes
ACN	616819
Time
Date	200405
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : cfb.vortac
State Reference	NY
Altitude	msl bound lower : 35000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc
Operator	common carrier : air carrier
Make Model Name	B747-400
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : j95.airway
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc artcc : zbw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-83
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 13 controller radar : 10
ASRS Report	616819
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 1200
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft #1 nwbound on J95 at FL350 overtaking C550 at FL350. Aircraft #2 opposite direction at FL370. Aircraft #1 was climbed to FL370. Saw confliction, tried to turn aircraft #2, but was already shipped to ZBW. Aircraft #2 turned, stopped climb and descended to FL350. Loss of separation at 4 mi, 1200 ft. Traffic cleared. Reclbed aircraft #1 and returned on course.

Original NASA ASRS Text

Title: ZNY CTLR EXPERIENCED OPERROR AT FL370 WITH 1 ACFT ON ZBW FREQ.

Narrative: ACFT #1 NWBOUND ON J95 AT FL350 OVERTAKING C550 AT FL350. ACFT #2 OPPOSITE DIRECTION AT FL370. ACFT #1 WAS CLBED TO FL370. SAW CONFLICTION, TRIED TO TURN ACFT #2, BUT WAS ALREADY SHIPPED TO ZBW. ACFT #2 TURNED, STOPPED CLB AND DSNDED TO FL350. LOSS OF SEPARATION AT 4 MI, 1200 FT. TFC CLRED. RECLBED ACFT #1 AND RETURNED ON COURSE.

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.