A319 crew and a low wing GA aircraft had less than legal separation in phl class B.

Attributes
ACN	585841
Time
Date	200306
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phl.airport
State Reference	PA
Altitude	msl single value : 2400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : phl.tower tracon : pct.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : phl.tower
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 11000 flight time type : 3000
ASRS Report	585841
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : required legal separation non adherence : clearance non adherence : far non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : separated traffic none taken : detected after the fact other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 1500 vertical : 100
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were cleared for a visual approach to runway 27R at phl. Just prior to the marker (speez) we got a TA and ATC gave us a traffic advisory at the same time. No visual identify was made at this moment. The TA showed traffic at a close 11 O'clock and 400 ft low. Very soon we had a climb RA. We were still outside the marker and at 2400 ft, the intruder aircraft was still climbing and the TCASII display showed him 100 ft low and slightly to our right. Our climb RA stayed active through 4000 ft before we were clear at conflict. The intruder aircraft was apparently climbing rapidly during the RA event. I was led to believe by phl ATC, that the other aircraft leveled at 2700 ft. ATC eventually continued our climb to 5000 ft and we got vectored for an uneventful approach and landed runway 27R. TRACON watch supervisor discussed the intruder aircraft. I got a glimpse of the intruder aircraft what appeared to be a general aviation low wing aircraft and was traveling sbound and climbing.

Original NASA ASRS Text

Title: A319 CREW AND A LOW WING GA ACFT HAD LESS THAN LEGAL SEPARATION IN PHL CLASS B.

Narrative: WE WERE CLRED FOR A VISUAL APCH TO RWY 27R AT PHL. JUST PRIOR TO THE MARKER (SPEEZ) WE GOT A TA AND ATC GAVE US A TFC ADVISORY AT THE SAME TIME. NO VISUAL IDENT WAS MADE AT THIS MOMENT. THE TA SHOWED TFC AT A CLOSE 11 O'CLOCK AND 400 FT LOW. VERY SOON WE HAD A CLB RA. WE WERE STILL OUTSIDE THE MARKER AND AT 2400 FT, THE INTRUDER ACFT WAS STILL CLBING AND THE TCASII DISPLAY SHOWED HIM 100 FT LOW AND SLIGHTLY TO OUR R. OUR CLB RA STAYED ACTIVE THROUGH 4000 FT BEFORE WE WERE CLR AT CONFLICT. THE INTRUDER ACFT WAS APPARENTLY CLBING RAPIDLY DURING THE RA EVENT. I WAS LED TO BELIEVE BY PHL ATC, THAT THE OTHER ACFT LEVELED AT 2700 FT. ATC EVENTUALLY CONTINUED OUR CLB TO 5000 FT AND WE GOT VECTORED FOR AN UNEVENTFUL APCH AND LANDED RWY 27R. TRACON WATCH SUPERVISOR DISCUSSED THE INTRUDER ACFT. I GOT A GLIMPSE OF THE INTRUDER ACFT WHAT APPEARED TO BE A GENERAL AVIATION LOW WING ACFT AND WAS TRAVELING SBOUND AND CLBING.

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.