B737 crew encounters near miss with traffic in ZLA airspace.

Attributes
ACN	413691
Time
Date	199809
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : fim
State Reference	CA
Altitude	msl bound lower : 14000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other
Route In Use	arrival star : star
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 20000 flight time type : 10000
ASRS Report	413691
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 550 vertical : 350
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

We were issued VFR traffic at either 14500 ft or 16500 ft. We acknowledged traffic. We were then given a frequency change. During this time, we made a turn on the arrival. It was then that I realized (we were descending) that we were on what appeared to be a collision course with the light twin traffic. I took evasive action and narrowly missed impact with the traffic.

Original NASA ASRS Text

Title: B737 CREW ENCOUNTERS NEAR MISS WITH TFC IN ZLA AIRSPACE.

Narrative: WE WERE ISSUED VFR TFC AT EITHER 14500 FT OR 16500 FT. WE ACKNOWLEDGED TFC. WE WERE THEN GIVEN A FREQ CHANGE. DURING THIS TIME, WE MADE A TURN ON THE ARR. IT WAS THEN THAT I REALIZED (WE WERE DSNDING) THAT WE WERE ON WHAT APPEARED TO BE A COLLISION COURSE WITH THE LIGHT TWIN TFC. I TOOK EVASIVE ACTION AND NARROWLY MISSED IMPACT WITH THE TFC.

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.