Air carrier receives TCASII RA, responds.

Attributes
ACN	181821
Time
Date	199106
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : msp
State Reference	MN
Altitude	msl bound lower : 4000 msl bound upper : 4700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : instrument pilot : flight engineer
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 1000
ASRS Report	181821
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft cleared for approach at msp runway 29L. As aircraft joined final in IMC TCAS showed target at 3 O'clock and coalt converging. ATC said nothing, they were very busy. Our flight was told to maintain 4000' until established but TCAS issued a 'RA' to 'climb now'. Aircraft was climbed through 4700' MSL before TCAS allowed return to 4000'. ATC was advised of altitude deviation.

Original NASA ASRS Text

Title: ACR RECEIVES TCASII RA, RESPONDS.

Narrative: ACFT CLRED FOR APCH AT MSP RWY 29L. AS ACFT JOINED FINAL IN IMC TCAS SHOWED TARGET AT 3 O'CLOCK AND COALT CONVERGING. ATC SAID NOTHING, THEY WERE VERY BUSY. OUR FLT WAS TOLD TO MAINTAIN 4000' UNTIL ESTABLISHED BUT TCAS ISSUED A 'RA' TO 'CLB NOW'. ACFT WAS CLBED THROUGH 4700' MSL BEFORE TCAS ALLOWED RETURN TO 4000'. ATC WAS ADVISED OF ALT DEV.

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.