A320 crew on the pdz arrival into lax receive a TCASII RA just prior to reaching arnes.

Attributes
ACN	624351
Time
Date	200407
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : arnes
State Reference	CA
Altitude	msl single value : 11000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 230 flight time total : 10500 flight time type : 4200
ASRS Report	624351
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical non adherence : far
Independent Detector	atc equipment other atc equipment : radar/mode c aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course
Miss Distance	vertical : 400
Supplementary
Problem Areas	Chart Or Publication Airspace Structure
Primary Problem	Airspace Structure

Narrative:

Near midair collision with another aircraft. First officer was flying. Got a TCASII RA while flying assigned route and altitude. ATC controller was busy. We were just leveling off at 11000 ft, thrust idle, speed brakes deployed. We did not see bogie aircraft, but TCASII showed he was climbing rapidly into us. We followed TCASII climb command, but as you might expect, engines seemed to take forever to spool up, as speed brakes were retracted. TCASII showed separation of 400 ft from aircraft. Told controller about our RA, and he stated that the bogie 'just popped up' and he didn't have time to warn us. ('Just popped up at 11000 ft indeed! Yeah, right!) clear of conflict, continued to uneventful landing. Spoke with TRACON supervisor after landing, and he told me that the bogie aircraft was well within his rights and completely legal in what he did, since he was outside of the class B airspace. Allowing VFR aircraft to pass through the arrival corridor of one of the nation's busiest airports, without contacting the controling ATC facility, is stupid. We could have lost this aircraft with 138 passenger and 5 crew.

Original NASA ASRS Text

Title: A320 CREW ON THE PDZ ARR INTO LAX RECEIVE A TCASII RA JUST PRIOR TO REACHING ARNES.

Narrative: NMAC WITH ANOTHER ACFT. FO WAS FLYING. GOT A TCASII RA WHILE FLYING ASSIGNED RTE AND ALT. ATC CTLR WAS BUSY. WE WERE JUST LEVELING OFF AT 11000 FT, THRUST IDLE, SPD BRAKES DEPLOYED. WE DID NOT SEE BOGIE ACFT, BUT TCASII SHOWED HE WAS CLBING RAPIDLY INTO US. WE FOLLOWED TCASII CLB COMMAND, BUT AS YOU MIGHT EXPECT, ENGS SEEMED TO TAKE FOREVER TO SPOOL UP, AS SPD BRAKES WERE RETRACTED. TCASII SHOWED SEPARATION OF 400 FT FROM ACFT. TOLD CTLR ABOUT OUR RA, AND HE STATED THAT THE BOGIE 'JUST POPPED UP' AND HE DIDN'T HAVE TIME TO WARN US. ('JUST POPPED UP AT 11000 FT INDEED! YEAH, RIGHT!) CLR OF CONFLICT, CONTINUED TO UNEVENTFUL LNDG. SPOKE WITH TRACON SUPVR AFTER LNDG, AND HE TOLD ME THAT THE BOGIE ACFT WAS WELL WITHIN HIS RIGHTS AND COMPLETELY LEGAL IN WHAT HE DID, SINCE HE WAS OUTSIDE OF THE CLASS B AIRSPACE. ALLOWING VFR ACFT TO PASS THROUGH THE ARR CORRIDOR OF ONE OF THE NATION'S BUSIEST ARPTS, WITHOUT CONTACTING THE CTLING ATC FACILITY, IS STUPID. WE COULD HAVE LOST THIS ACFT WITH 138 PAX AND 5 CREW.

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.