Air carrier in climb has TCASII RA. Continues climb beyond assigned altitude.

Attributes
ACN	204437
Time
Date	199203
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sxc
State Reference	CA
Altitude	msl bound lower : 12000 msl bound upper : 12400
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	enroute other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8700 flight time type : 3000
ASRS Report	204437
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 12000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Climbing to interim altitude of 12000 MSL in compliance with musels/thermal transition from sna. Recognized a TA from TCASII at 10 O'clock, 500 below and climbing greater than our climb rate (now less than 1000 FPM) and seemingly converging. Captain queried ATC preemptively of this traffic and was assured that he had us in sight -- not possible. Intruding aircraft showed 'too' on TCASII and since we neared (within 200 ft, 12000 ft MSL) with holes becoming visible in cloud layer indicating that the tops were near, I elected to continue climb to be assured of visually identing and then separating myself from conflicting traffic. I leveled at 12400 briefly, now noting descent of intruder whereby I descended to assigned altitude. Captain continued to discuss incident with ZLA explaining nature of altitude excursion. Both captain and center controller seemed to feel that the situation was resolved satisfactorily.

Original NASA ASRS Text

Title: ACR IN CLB HAS TCASII RA. CONTINUES CLB BEYOND ASSIGNED ALT.

Narrative: CLBING TO INTERIM ALT OF 12000 MSL IN COMPLIANCE WITH MUSELS/THERMAL TRANSITION FROM SNA. RECOGNIZED A TA FROM TCASII AT 10 O'CLOCK, 500 BELOW AND CLBING GREATER THAN OUR CLB RATE (NOW LESS THAN 1000 FPM) AND SEEMINGLY CONVERGING. CAPT QUERIED ATC PREEMPTIVELY OF THIS TFC AND WAS ASSURED THAT HE HAD US IN SIGHT -- NOT POSSIBLE. INTRUDING ACFT SHOWED 'TOO' ON TCASII AND SINCE WE NEARED (WITHIN 200 FT, 12000 FT MSL) WITH HOLES BECOMING VISIBLE IN CLOUD LAYER INDICATING THAT THE TOPS WERE NEAR, I ELECTED TO CONTINUE CLB TO BE ASSURED OF VISUALLY IDENTING AND THEN SEPARATING MYSELF FROM CONFLICTING TFC. I LEVELED AT 12400 BRIEFLY, NOW NOTING DSCNT OF INTRUDER WHEREBY I DSNDED TO ASSIGNED ALT. CAPT CONTINUED TO DISCUSS INCIDENT WITH ZLA EXPLAINING NATURE OF ALT EXCURSION. BOTH CAPT AND CTR CTLR SEEMED TO FEEL THAT THE SITUATION WAS RESOLVED SATISFACTORILY.

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.