Air carrier widebody transport altitude deviation in response to TCASII RA.

Attributes
ACN	185348
Time
Date	199108
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : dfw
State Reference	TX
Altitude	msl bound lower : 10500 msl bound upper : 11000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dfw
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other descent other
Route In Use	enroute airway : dfw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 8000 flight time type : 3000
ASRS Report	185348
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Miss Distance	horizontal : 0 vertical : 1500
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

TCAS TA intruder plus 12 (1200 ft). TCAS RA 'descend'. We descended to 10500 ft, advised ATC. ATC called traffic at 12000 ft (he was overtaking us). TCAS 'clear of conflict.'

Original NASA ASRS Text

Title: ACR WDB ALT DEV IN RESPONSE TO TCASII RA.

Narrative: TCAS TA INTRUDER PLUS 12 (1200 FT). TCAS RA 'DSND'. WE DSNDED TO 10500 FT, ADVISED ATC. ATC CALLED TFC AT 12000 FT (HE WAS OVERTAKING US). TCAS 'CLR OF CONFLICT.'

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.