B737-300 crew and A320 had less than legal separation in ZLA class east.

Attributes
ACN	537268
Time
Date	200202
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : pdz.vortac
State Reference	CA
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zla.artcc
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Navigation In Use	other other vortac
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : flight engineer pilot : multi engine pilot : atp
Experience	flight time last 90 days : 100 flight time total : 14000 flight time type : 7000
ASRS Report	537268
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : overshoot conflict : airborne critical non adherence : company policies non adherence : far non adherence : published procedure non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : separated traffic flight crew : took evasive action none taken : detected after the fact other
Miss Distance	horizontal : 2500 vertical : 0
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After passing pdz VOR, center told us to maintain 7000 ft due to A320 airbus descending to 8000 ft. While level at 7000 ft we could see that A320 was descending through 8000 ft. Since our courses were taking us very close to each other, I climbed to avoid the airbus. Just as I started to climb, center told us to climb, and TCASII told us to climb.

Original NASA ASRS Text

Title: B737-300 CREW AND A320 HAD LESS THAN LEGAL SEPARATION IN ZLA CLASS E.

Narrative: AFTER PASSING PDZ VOR, CTR TOLD US TO MAINTAIN 7000 FT DUE TO A320 AIRBUS DSNDING TO 8000 FT. WHILE LEVEL AT 7000 FT WE COULD SEE THAT A320 WAS DSNDING THROUGH 8000 FT. SINCE OUR COURSES WERE TAKING US VERY CLOSE TO EACH OTHER, I CLBED TO AVOID THE AIRBUS. JUST AS I STARTED TO CLB, CTR TOLD US TO CLB, AND TCASII TOLD US TO CLB.

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.