Phl controller loses separation at 12000 ft as second aircraft overtook preceding traffic that had b...

Attributes
ACN	673882
Time
Date	200510
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ptw.airport
State Reference	PA
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : phl.tower tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : phl.tower
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 170/175 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : military controller : radar
Experience	controller military : 3 controller radar : 17 controller time certified in position1 : 15
ASRS Report	673882
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other controllera
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was working a combined sector of north departure and north high; an overflt sector. I switched air carrier X to ZNY at 12000 ft and noticed air carrier Y still at 12000 ft and closing on air carrier X from behind. I issued a vector and a climb to 13000 ft to air carrier Y. At that time; I noticed air carrier X also climbing.

Original NASA ASRS Text

Title: PHL CTLR LOSES SEPARATION AT 12000 FT AS SECOND ACFT OVERTOOK PRECEDING TFC THAT HAD BEEN XFERRED TO ZNY.

Narrative: I WAS WORKING A COMBINED SECTOR OF N DEP AND N HIGH; AN OVERFLT SECTOR. I SWITCHED ACR X TO ZNY AT 12000 FT AND NOTICED ACR Y STILL AT 12000 FT AND CLOSING ON ACR X FROM BEHIND. I ISSUED A VECTOR AND A CLB TO 13000 FT TO ACR Y. AT THAT TIME; I NOTICED ACR X ALSO CLBING.

Data retrieved from NASA's ASRS site as of January 2009 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.

Phl controller loses separation at 12000 ft as second aircraft overtook preceding traffic that had been xferred to ZNY.