B737 flight crew receives a TCASII RA while departure from aus.

Attributes
ACN	593881
Time
Date	200309
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : aus.airport
State Reference	TX
Altitude	msl single value : 13000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zhu.artcc
Operator	common carrier : air carrier
Make Model Name	B737-500
Operating Under FAR Part	Part 121
Navigation In Use	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
Experience	flight time last 90 days : 240 flight time total : 30000 flight time type : 27000
ASRS Report	593881
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : required legal separation
Independent Detector	aircraft equipment : tcas other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

We were climbing through 13000 ft MSL west of austin, tx, when the TCASII gave a RA for a single engine aircraft that was approaching from northwest of our position at 13500 ft. We complied with the RA and descended to 12500 ft. The small aircraft passed overhead. We notified the center of the conflict and our action, and he continued to climb to FL230.. Houston center advised that the aircraft was a pop-up and not noticed earlier.

Original NASA ASRS Text

Title: B737 FLT CREW RECEIVES A TCASII RA WHILE DEP FROM AUS.

Narrative: WE WERE CLBING THROUGH 13000 FT MSL W OF AUSTIN, TX, WHEN THE TCASII GAVE A RA FOR A SINGLE ENG ACFT THAT WAS APCHING FROM NW OF OUR POS AT 13500 FT. WE COMPLIED WITH THE RA AND DSNDED TO 12500 FT. THE SMALL ACFT PASSED OVERHEAD. WE NOTIFIED THE CTR OF THE CONFLICT AND OUR ACTION, AND HE CONTINUED TO CLB TO FL230.. HOUSTON CTR ADVISED THAT THE ACFT WAS A POP-UP AND NOT NOTICED EARLIER.

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.