A B737 flight crew overshot localizer on approach to lax and received a TCASII RA.

Attributes
ACN	438930
Time
Date	199906
Day	Sat
Local Time Of Day	1201 To 1800
Place
State Reference	CA
Altitude	msl single value : 12000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Navigation In Use	ils localizer & glide slope : 25l
Flight Phase	descent : intermediate altitude
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sct.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 24r
Flight Phase	descent : intermediate altitude
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp
Experience	flight time last 90 days : 240 flight time total : 7000 flight time type : 3000
ASRS Report	438930
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument pilot : multi engine
Events
Anomaly	conflict : airborne less severe other spatial deviation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued advisory flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

Cleared to intercept runway 25L localizer for the ILS approach to lax. At this time lax approach gave us TA, a B737 on approach for the north complex. We acknowledged traffic in sight. While busy doing landing checklist, I noticed that the first officer was about to go through the localizer. Lax approach asked me 'are you turning for runway 25L localizer?' during the turn we did get an RA.

Original NASA ASRS Text

Title: A B737 FLC OVERSHOT LOC ON APCH TO LAX AND RECEIVED A TCASII RA.

Narrative: CLRED TO INTERCEPT RWY 25L LOC FOR THE ILS APCH TO LAX. AT THIS TIME LAX APCH GAVE US TA, A B737 ON APCH FOR THE N COMPLEX. WE ACKNOWLEDGED TFC IN SIGHT. WHILE BUSY DOING LNDG CHKLIST, I NOTICED THAT THE FO WAS ABOUT TO GO THROUGH THE LOC. LAX APCH ASKED ME 'ARE YOU TURNING FOR RWY 25L LOC?' DURING THE TURN WE DID GET AN RA.

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.