Narrative:

Scurry arrival at dfw approaching refil fix at 11000 ft, received TCASII climb command. First officer disconnected autoplt and began climb. After clear of conflict first officer rearmed altitude setting at 11000 ft and pressed flight level change and did not re- engage autoplt. As captain notified ATC of TCASII response aircraft descended below 11000 ft approximately 400 ft.

Google
 

Original NASA ASRS Text

Title: ALTDEV ALT EXCURSION AFTER A TCASII RA.

Narrative: SCURRY ARR AT DFW APCHING REFIL FIX AT 11000 FT, RECEIVED TCASII CLB COMMAND. FO DISCONNECTED AUTOPLT AND BEGAN CLB. AFTER CLR OF CONFLICT FO REARMED ALT SETTING AT 11000 FT AND PRESSED FLT LEVEL CHANGE AND DID NOT RE- ENGAGE AUTOPLT. AS CAPT NOTIFIED ATC OF TCASII RESPONSE ACFT DSNDED BELOW 11000 FT APPROX 400 FT.

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.