Cpr-small transport GA-small transport close proximity near bucks fix.

Attributes
ACN	93093
Time
Date	198808
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dqo airport : phl
State Reference	PA
Altitude	msl bound lower : 7200 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute airway : v210
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 50 flight time total : 4400
ASRS Report	93093
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 75
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

On the approach to phl, descending to 6000' in contact with phl approach control, just about over the bucks intersection. Passing through 7200' copilot sighted an small transport in level flight esebound at our 11 O'clock position established 500 yds distance. I immediately took evasive action by pushing forward on the control wheel. We passed within 50-100' just below the small transport. Just prior an small transport had called approach control for flight following passing through his sector at 7500'. At no time did approach control call the traffic. We were traveling at 240 KTS in descent and overtaking the small transport rapidly. I believe that ATC is not obliged to call VFR traffic for IFR traffic outside the TCA. However, this mixture of IFR and VFR traffic is the most hazardous element of the system today. ATC should be obliged to call VFR traffic, particularly in areas around TCA's, perhaps below 10000'.

Original NASA ASRS Text

Title: CPR-SMT GA-SMT CLOSE PROX NEAR BUCKS FIX.

Narrative: ON THE APCH TO PHL, DSNDING TO 6000' IN CONTACT WITH PHL APCH CTL, JUST ABOUT OVER THE BUCKS INTXN. PASSING THROUGH 7200' COPLT SIGHTED AN SMT IN LEVEL FLT ESEBOUND AT OUR 11 O'CLOCK POS ESTABLISHED 500 YDS DISTANCE. I IMMEDIATELY TOOK EVASIVE ACTION BY PUSHING FORWARD ON THE CONTROL WHEEL. WE PASSED WITHIN 50-100' JUST BELOW THE SMT. JUST PRIOR AN SMT HAD CALLED APCH CTL FOR FLT FOLLOWING PASSING THROUGH HIS SECTOR AT 7500'. AT NO TIME DID APCH CTL CALL THE TFC. WE WERE TRAVELING AT 240 KTS IN DSCNT AND OVERTAKING THE SMT RAPIDLY. I BELIEVE THAT ATC IS NOT OBLIGED TO CALL VFR TFC FOR IFR TFC OUTSIDE THE TCA. HOWEVER, THIS MIXTURE OF IFR AND VFR TFC IS THE MOST HAZARDOUS ELEMENT OF THE SYS TODAY. ATC SHOULD BE OBLIGED TO CALL VFR TFC, PARTICULARLY IN AREAS AROUND TCA'S, PERHAPS BELOW 10000'.

Data retrieved from NASA's ASRS site as of August 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.