Flight crew of an medium large transport air carrier aircraft received a TCASII RA warning during climb after takeoff but did not have time to take evasive action since the RA changed from climb to descend commands so fast that they had no time to respond.

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Attributes
ACN	253946
Time
Date	199310
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax
State Reference	CA
Altitude	msl bound lower : 1600 msl bound upper : 1700
Environment
Flight Conditions	IMC
Light	Daylight
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 Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : initial
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 11000 flight time type : 1000
ASRS Report	253946
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	unspecified : 2000 vertical : 100
Supplementary
Air Traffic Incident	Pilot Deviation other

Narrative:

At approximately 1600-1700 ft MSL, TCASII gave monitor vertical speed for climb. The alert immediately changed to resolution conflict. TCASII changed from climb to descent commands. We suspect we cleared traffic by 100 ft. I think ATC allowed a departure from the north complex runways with a sbound departure path. This path crosses the departure path of the south complex runways.

Original NASA ASRS Text

Title: FLC OF AN MLG ACR ACFT RECEIVED A TCASII RA WARNING DURING CLB AFTER TKOF BUT DID NOT HAVE TIME TO TAKE EVASIVE ACTION SINCE THE RA CHANGED FROM CLB TO DSND COMMANDS SO FAST THAT THEY HAD NO TIME TO RESPOND.

Narrative: AT APPROX 1600-1700 FT MSL, TCASII GAVE MONITOR VERT SPD FOR CLB. THE ALERT IMMEDIATELY CHANGED TO RESOLUTION CONFLICT. TCASII CHANGED FROM CLB TO DSCNT COMMANDS. WE SUSPECT WE CLRED TFC BY 100 FT. I THINK ATC ALLOWED A DEP FROM THE N COMPLEX RWYS WITH A SBOUND DEP PATH. THIS PATH CROSSES THE DEP PATH OF THE S COMPLEX RWYS.

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.