Phl approach controller experienced operational error vectoring slower aircraft behind faster aircra...

Attributes
ACN	631799
Time
Date	200409
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl bound lower : 4000 msl bound upper : 4700
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air taxi
Make Model Name	PA-31 Navajo Chieftan/Mojave/Navajo T1020
Operating Under FAR Part	Part 135
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : phl.tracon
Operator	common carrier : air taxi
Make Model Name	Learjet 35
Operating Under FAR Part	Part 135
Flight Phase	descent : approach descent : intermediate altitude
Route In Use	arrival : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 10
ASRS Report	631799
Person 2
Affiliation	company : air taxi
Function	flight crew : single pilot
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	vertical : 700
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

PA31 departed runway 35 at phl. Climbing to 4000 ft was issued a turn to the northeast. LR35 12 mi north of phl sebound issued a descent to 3000 ft from 6000 ft. The PA31 was issued immediate instructions to turn behind the LR35. The LR35 was at 4700 ft when the PA31 at 4000 ft descending and on a heading behind the LR35.

Original NASA ASRS Text

Title: PHL APCH CTLR EXPERIENCED OPERROR VECTORING SLOWER ACFT BEHIND FASTER ACFT AT 4000 FT.

Narrative: PA31 DEPARTED RWY 35 AT PHL. CLBING TO 4000 FT WAS ISSUED A TURN TO THE NE. LR35 12 MI N OF PHL SEBOUND ISSUED A DSCNT TO 3000 FT FROM 6000 FT. THE PA31 WAS ISSUED IMMEDIATE INSTRUCTIONS TO TURN BEHIND THE LR35. THE LR35 WAS AT 4700 FT WHEN THE PA31 AT 4000 FT DSNDING AND ON A HDG BEHIND THE LR35.

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.

Phl approach controller experienced operational error vectoring slower aircraft behind faster aircraft at 4000 ft.