An air carrier medium large transport had to climb in response to a TCASII command. Altitude deviati...

Attributes
ACN	342700
Time
Date	199607
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : dxo
State Reference	MI
Altitude	msl bound lower : 12000 msl bound upper : 12700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 220 flight time total : 15000 flight time type : 9000
ASRS Report	342700
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took evasive action other
Consequence	Other
Miss Distance	vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

We were heading 055 degrees at 12000 ft, speed 320 KTS assigned in VMC conditions. TCASII showed traffic at 11500 ft and instructed us to climb. We stopped climb at 12700 ft with clear of conflict. When ATC advised of TCASII climb, he stated that traffic just popped and instructed us to turn to a heading of 90 degrees to avoid traffic. We leveled off at 12000 ft. Never saw traffic. Note: TCASII would have continued to indicate a 1500 FPM climb if we had not passed traffic.

Original NASA ASRS Text

Title: AN ACR MLG HAD TO CLB IN RESPONSE TO A TCASII COMMAND. ALTDEV. POP-UP TFC.

Narrative: WE WERE HDG 055 DEGS AT 12000 FT, SPD 320 KTS ASSIGNED IN VMC CONDITIONS. TCASII SHOWED TFC AT 11500 FT AND INSTRUCTED US TO CLB. WE STOPPED CLB AT 12700 FT WITH CLR OF CONFLICT. WHEN ATC ADVISED OF TCASII CLB, HE STATED THAT TFC JUST POPPED AND INSTRUCTED US TO TURN TO A HDG OF 90 DEGS TO AVOID TFC. WE LEVELED OFF AT 12000 FT. NEVER SAW TFC. NOTE: TCASII WOULD HAVE CONTINUED TO INDICATE A 1500 FPM CLB IF WE HAD NOT PASSED TFC.

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.

An air carrier medium large transport had to climb in response to a TCASII command. Altitude deviation. Pop-up traffic.