ZNY controller experienced loss of separation with en route climbing aircraft at 10000 ft.

Attributes
ACN	597649
Time
Date	200310
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mdt.airport
State Reference	PA
Altitude	msl single value : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc tracon : mdt.tracon
Operator	general aviation : corporate
Make Model Name	Learjet 45
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc tracon : mdt.tracon
Operator	common carrier : air carrier
Make Model Name	Jetstream 41
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 24000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Inter Facility Coordination Failure Operational Error

Narrative:

Harrisburg approach asked for a higher altitude on aircraft X (lear 45) mdt larri.J110. I approved 10000 ft due to traffic aircraft Y (JS41) at 11000 ft transitioning sector 11. I was sector 27 mdt low. Sector 11 descended aircraft Y to 9000 ft. I was unaware that aircraft X was direct larri. I assumed he was direct air as per LOA. Aircraft passed with approximately 3 mi separation less than the 5 mi required. Operational error detection patch was not activated.

Original NASA ASRS Text

Title: ZNY CTLR EXPERIENCED LOSS OF SEPARATION WITH ENRTE CLBING ACFT AT 10000 FT.

Narrative: HARRISBURG APCH ASKED FOR A HIGHER ALT ON ACFT X (LEAR 45) MDT LARRI.J110. I APPROVED 10000 FT DUE TO TFC ACFT Y (JS41) AT 11000 FT TRANSITIONING SECTOR 11. I WAS SECTOR 27 MDT LOW. SECTOR 11 DSNDED ACFT Y TO 9000 FT. I WAS UNAWARE THAT ACFT X WAS DIRECT LARRI. I ASSUMED HE WAS DIRECT AIR AS PER LOA. ACFT PASSED WITH APPROX 3 MI SEPARATION LESS THAN THE 5 MI REQUIRED. OPERATIONAL ERROR DETECTION PATCH WAS NOT ACTIVATED.

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.