Large transport flight crew descended in response to a TCASII RA during climb out and then was given heading change to avoid a light twin level just above the altitude through which they would be climbing. Subsequently, they had another TCASII RA for an aircraft just above to which ARTCC gave another heading change. This conflict was caused by making the first heading change requested by ARTCC controller.

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Attributes
ACN	513193
Time
Date	200106
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : vny.airport
State Reference	CA
Altitude	msl bound lower : 12000 msl bound upper : 13500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla.artcc tower : bwi.tower
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude climbout : vacating altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zla.artcc
Operator	general aviation : personal
Make Model Name	Small Transport
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 18600 flight time type : 8000
ASRS Report	513193
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	atc equipment other atc equipment : radar aircraft equipment : tcas other controllera other flight crewa other flight crewb
Resolutory Action	controller : separated traffic flight crew : took precautionary avoidance action
Miss Distance	horizontal : 5000 vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

On climb out out of lax, we were cleared to FL230. At 12000 ft, we responded immediately to an RA to descend. (A VFR light twin engine was at 11 O'clock position, level at 12500 ft. Then ZLA gave us an immediate turn to the right heading 080 degrees. After we were clear of conflict, we continued our climb. Out of 13500 ft we received another momentary RA to stop climb for another aircraft (a B737 level at 14000 ft, descending to vny). Center then gave us a turn to the left and we then had an uneventful climb to altitude. The first TCASII RA forced center to turn us to the right which created a second TCASII RA, as we continued our climb.

Original NASA ASRS Text

Title: LGT FLC DSNDED IN RESPONSE TO A TCASII RA DURING CLBOUT AND THEN WAS GIVEN HDG CHANGE TO AVOID A LIGHT TWIN LEVEL JUST ABOVE THE ALT THROUGH WHICH THEY WOULD BE CLBING. SUBSEQUENTLY, THEY HAD ANOTHER TCASII RA FOR AN ACFT JUST ABOVE TO WHICH ARTCC GAVE ANOTHER HDG CHANGE. THIS CONFLICT WAS CAUSED BY MAKING THE FIRST HDG CHANGE REQUESTED BY ARTCC CTLR.

Narrative: ON CLBOUT OUT OF LAX, WE WERE CLRED TO FL230. AT 12000 FT, WE RESPONDED IMMEDIATELY TO AN RA TO DSND. (A VFR LIGHT TWIN ENG WAS AT 11 O'CLOCK POS, LEVEL AT 12500 FT. THEN ZLA GAVE US AN IMMEDIATE TURN TO THE R HDG 080 DEGS. AFTER WE WERE CLR OF CONFLICT, WE CONTINUED OUR CLB. OUT OF 13500 FT WE RECEIVED ANOTHER MOMENTARY RA TO STOP CLB FOR ANOTHER ACFT (A B737 LEVEL AT 14000 FT, DSNDING TO VNY). CTR THEN GAVE US A TURN TO THE L AND WE THEN HAD AN UNEVENTFUL CLB TO ALT. THE FIRST TCASII RA FORCED CTR TO TURN US TO THE R WHICH CREATED A SECOND TCASII RA, AS WE CONTINUED OUR 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.