Phl controller unable to ensure separation between departure and arrival B190 and DHC8.

Attributes
ACN	469965
Time
Date	200004
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl bound lower : 5000 msl bound upper : 6000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air taxi
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	descent : approach
Route In Use	arrival : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air carrier
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller military : 8 controller radar : 31
ASRS Report	469965
Person 2
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe inflight encounter : weather non adherence : required legal separation non adherence : published procedure
Independent Detector	aircraft equipment : tcas other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	faa : investigated
Supplementary
Problem Areas	Weather Flight Crew Human Performance Airspace Structure ATC Human Performance
Primary Problem	Airspace Structure
Air Traffic Incident	Operational Error other

Narrative:

I was working the ard position combined with the ptw position at phl TRACON. We were trying to split off the position and I had 8-10 aircraft on vectors. Air carrier X was being vectored to runway 9R because the WX did not allow landing on the secondary runway. He was heading 110 degrees at 5000 ft to follow a jet working another sector. Air carrier Y was a departure from phl given direct ptw by the departure controller. They got too close because I was distraction with several arrs and departures at ttn and pne. The conflict alert drew my attention and I turned air carrier X southwest and descended him to 3000 ft and called the traffic. I then climbed air carrier Y to 6000 ft and turned him east, but he had not been switched to my frequency yet. When I unkeyed he called, for the first time, saying he had a TCASII alert and was climbing. So I repeated my instruction. Separation was then attained.

Original NASA ASRS Text

Title: PHL CTLR UNABLE TO ENSURE SEPARATION BTWN DEP AND ARR B190 AND DHC8.

Narrative: I WAS WORKING THE ARD POS COMBINED WITH THE PTW POS AT PHL TRACON. WE WERE TRYING TO SPLIT OFF THE POS AND I HAD 8-10 ACFT ON VECTORS. ACR X WAS BEING VECTORED TO RWY 9R BECAUSE THE WX DID NOT ALLOW LNDG ON THE SECONDARY RWY. HE WAS HDG 110 DEGS AT 5000 FT TO FOLLOW A JET WORKING ANOTHER SECTOR. ACR Y WAS A DEP FROM PHL GIVEN DIRECT PTW BY THE DEP CTLR. THEY GOT TOO CLOSE BECAUSE I WAS DISTR WITH SEVERAL ARRS AND DEPS AT TTN AND PNE. THE CONFLICT ALERT DREW MY ATTN AND I TURNED ACR X SW AND DSNDED HIM TO 3000 FT AND CALLED THE TFC. I THEN CLBED ACR Y TO 6000 FT AND TURNED HIM E, BUT HE HAD NOT BEEN SWITCHED TO MY FREQ YET. WHEN I UNKEYED HE CALLED, FOR THE FIRST TIME, SAYING HE HAD A TCASII ALERT AND WAS CLBING. SO I REPEATED MY INSTRUCTION. SEPARATION WAS THEN ATTAINED.

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.