Air carrier on climb has near midair collision with second aircraft. TCASII RA.

Attributes
ACN	223120
Time
Date	199209
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 16000 msl bound upper : 16500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : lax
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 240 flight time total : 8500 flight time type : 3500
ASRS Report	223120
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : required legal separation
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 400
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

On departure from lax, we were given a climb from 11000 to 33000. We working with departure control and were in a TCASII equipped aircraft. During our climb, we noted several aircraft on TCASII and one that was at 16500 and apparently paralleling our course, judging from movement on TCASII. We also acquired the aircraft visually. The controller called traffic at 2 mi and 16500 ft. We were climbing through 16000 ft. At the same time we were given a TCASII alert followed immediately by a command to descend from the TCASII. We initiated the descent as the aircraft passed directly overhead and about 400 ft above us. The controller asked if we were continuing our climb, and our response was that we were descending per TCASII, and that 'it was a perfect collision course.' we do not know why the controller waited so long to call the traffic that was heading on a converging course to us.

Original NASA ASRS Text

Title: ACR ON CLB HAS NMAC WITH SECOND ACFT. TCASII RA.

Narrative: ON DEP FROM LAX, WE WERE GIVEN A CLB FROM 11000 TO 33000. WE WORKING WITH DEP CTL AND WERE IN A TCASII EQUIPPED ACFT. DURING OUR CLB, WE NOTED SEVERAL ACFT ON TCASII AND ONE THAT WAS AT 16500 AND APPARENTLY PARALLELING OUR COURSE, JUDGING FROM MOVEMENT ON TCASII. WE ALSO ACQUIRED THE ACFT VISUALLY. THE CTLR CALLED TFC AT 2 MI AND 16500 FT. WE WERE CLBING THROUGH 16000 FT. AT THE SAME TIME WE WERE GIVEN A TCASII ALERT FOLLOWED IMMEDIATELY BY A COMMAND TO DSND FROM THE TCASII. WE INITIATED THE DSCNT AS THE ACFT PASSED DIRECTLY OVERHEAD AND ABOUT 400 FT ABOVE US. THE CTLR ASKED IF WE WERE CONTINUING OUR CLB, AND OUR RESPONSE WAS THAT WE WERE DSNDING PER TCASII, AND THAT 'IT WAS A PERFECT COLLISION COURSE.' WE DO NOT KNOW WHY THE CTLR WAITED SO LONG TO CALL THE TFC THAT WAS HDG ON A CONVERGING COURSE TO US.

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.