Phl radar controller lost required separation with aircraft on vectors.

Attributes
ACN	575887
Time
Date	200303
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl single value : 6000
Environment
Flight Conditions	Marginal
Weather Elements	Ice
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
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	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 20 controller time certified in position1 : 15
ASRS Report	575887
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	conflict : airborne critical non adherence : required legal separation
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas
Resolutory Action	controller : issued advisory flight crew : took evasive action none taken : insufficient time
Consequence	faa : investigated
Miss Distance	horizontal : 9000 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

2 aircraft were on vectors for downwind to final approach. The first aircraft was on a dogleg turn due to an earlier missed turn. The second aircraft was on a base turn and converging. Due to working other traffic, these two eventually became a problem. Several xmissions to resolve the problem did not get through and a loss of separation and TA for 1 aircraft occurred.

Original NASA ASRS Text

Title: PHL RADAR CTLR LOST REQUIRED SEPARATION WITH ACFT ON VECTORS.

Narrative: 2 ACFT WERE ON VECTORS FOR DOWNWIND TO FINAL APCH. THE FIRST ACFT WAS ON A DOGLEG TURN DUE TO AN EARLIER MISSED TURN. THE SECOND ACFT WAS ON A BASE TURN AND CONVERGING. DUE TO WORKING OTHER TFC, THESE TWO EVENTUALLY BECAME A PROB. SEVERAL XMISSIONS TO RESOLVE THE PROB DID NOT GET THROUGH AND A LOSS OF SEPARATION AND TA FOR 1 ACFT OCCURRED.

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.