B737 crew used TCASII TA to avoid an near midair collision in sct class B.

Attributes
ACN	475394
Time
Date	200006
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lgb.airport
State Reference	CA
Altitude	msl single value : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : vacating altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 26000 flight time type : 9000
ASRS Report	475394
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Events
Anomaly	non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Problem Areas	Airspace Structure ATC Human Performance Flight Crew Human Performance FAA
Primary Problem	Ambiguous

Narrative:

On noise abatement climb out of lgb and cleared to 4000 ft we noticed cessna on TCASII. We stopped climb and cessna overflew us at 3500 ft. We asked socal if they noticed the cessna and they said 'no, but do now on mode C.'

Original NASA ASRS Text

Title: B737 CREW USED TCASII TA TO AVOID AN NMAC IN SCT CLASS B.

Narrative: ON NOISE ABATEMENT CLB OUT OF LGB AND CLRED TO 4000 FT WE NOTICED CESSNA ON TCASII. WE STOPPED CLB AND CESSNA OVERFLEW US AT 3500 FT. WE ASKED SOCAL IF THEY NOTICED THE CESSNA AND THEY SAID 'NO, BUT DO NOW ON MODE C.'

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.