Air carrier took evasive action to avoid an small aircraft in close proximity.

Attributes
ACN	126887
Time
Date	198910
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : bur
State Reference	CA
Altitude	msl bound lower : 4500 msl bound upper : 5000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bur
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument pilot : commercial
Experience	flight time last 90 days : 180 flight time total : 7000 flight time type : 1400
ASRS Report	126887
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

ATC gave us traffic advisory, then frequency change. He called back to have us keep on frequency because of proximity of traffic. We saw what appeared to be the aircraft in question (low wing, single engine) at our 11:30 position moving from left to right and appearing to be climbing. ATC instructed us to turn right and climb, which appeared to me to put us on a collision course. Instead I turned left and descended and aircraft passed overhead. We told controller we were clear of traffic and he handled us off to next controller. We had to make turns and altitude changes contrary to controller's discretion. In fact, opp altitude deviations were 500-1000', first climbing, then descending to avoid traffic.

Original NASA ASRS Text

Title: ACR TOOK EVASIVE ACTION TO AVOID AN SMA IN CLOSE PROX.

Narrative: ATC GAVE US TFC ADVISORY, THEN FREQ CHANGE. HE CALLED BACK TO HAVE US KEEP ON FREQ BECAUSE OF PROX OF TFC. WE SAW WHAT APPEARED TO BE THE ACFT IN QUESTION (LOW WING, SINGLE ENG) AT OUR 11:30 POS MOVING FROM LEFT TO RIGHT AND APPEARING TO BE CLBING. ATC INSTRUCTED US TO TURN RIGHT AND CLB, WHICH APPEARED TO ME TO PUT US ON A COLLISION COURSE. INSTEAD I TURNED LEFT AND DSNDED AND ACFT PASSED OVERHEAD. WE TOLD CTLR WE WERE CLR OF TFC AND HE HANDLED US OFF TO NEXT CTLR. WE HAD TO MAKE TURNS AND ALT CHANGES CONTRARY TO CTLR'S DISCRETION. IN FACT, OPP ALT DEVIATIONS WERE 500-1000', FIRST CLBING, THEN DSNDING TO AVOID TFC.

Data retrieved from NASA's ASRS site as of August 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.