Widebody transport has TCASII TA, RA, descends.

Attributes
ACN	253894
Time
Date	199306
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : tnn
State Reference	FO
Altitude	msl bound lower : 16200 msl bound upper : 17000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : rctp
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial
Experience	flight time last 90 days : 280 flight time total : 17000 flight time type : 2300
ASRS Report	253894
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance non adherence : required legal separation other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 2000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Leveled off at 17000 ft per taipei control. TCASII traffic aural and visual alerts sounded with traffic 12 O'clock in front of us at 1/2 mi and climbing into our altitude. Eadi specified a descent to avoid collision. We followed TCASII signals and descended to 16200 ft before returning to 17000 ft. Taipei control was notified of the descent and potential near midair collision. Requested ATC and radar tapes be marked for investigation.

Original NASA ASRS Text

Title: WDB HAS TCASII TA, RA, DSNDS.

Narrative: LEVELED OFF AT 17000 FT PER TAIPEI CTL. TCASII TFC AURAL AND VISUAL ALERTS SOUNDED WITH TFC 12 O'CLOCK IN FRONT OF US AT 1/2 MI AND CLBING INTO OUR ALT. EADI SPECIFIED A DSCNT TO AVOID COLLISION. WE FOLLOWED TCASII SIGNALS AND DSNDED TO 16200 FT BEFORE RETURNING TO 17000 FT. TAIPEI CTL WAS NOTIFIED OF THE DSCNT AND POTENTIAL NMAC. REQUESTED ATC AND RADAR TAPES BE MARKED FOR INVESTIGATION.

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.