TCASII RA creates an altitude deviation altitude excursion by PIC.

Attributes
ACN	199991
Time
Date	199201
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : dtw
State Reference	MI
Altitude	msl bound lower : 11000 msl bound upper : 11500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dtw
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 210 flight time total : 12000 flight time type : 6500
ASRS Report	199991
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

We were level at 11000 ft. We left 11000 ft and climbed up to 11500 ft to solve an RA on our TCASII. We advised dtw approach of our deviation and returned to 11000 ft.

Original NASA ASRS Text

Title: TCASII RA CREATES AN ALTDEV ALT EXCURSION BY PIC.

Narrative: WE WERE LEVEL AT 11000 FT. WE LEFT 11000 FT AND CLBED UP TO 11500 FT TO SOLVE AN RA ON OUR TCASII. WE ADVISED DTW APCH OF OUR DEV AND RETURNED TO 11000 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.