Air carrier large transport flight crew experiences altitude deviation on approach to msp due TCAS R...

Attributes
ACN	178345
Time
Date	199105
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 2400 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : msp
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15000
ASRS Report	178345
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	vertical : 100
Supplementary
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

While on approach at msp, we received TCAS TA followed immediately by RA with an indicator red DOT 01-02 and audio, 'traffic climb.' we started climb above G/south an asked tower if they had traffic. They replied negative. (They said only traffic was an small transport on runway 11R. We also could see it.) an air carrier aircraft behind us reported an small aircraft Y at approximately 2400'. Their aircraft was not TCAS equipped.

Original NASA ASRS Text

Title: ACR LGT FLT CREW EXPERIENCES ALT DEVIATION ON APCH TO MSP DUE TCAS RA.

Narrative: WHILE ON APCH AT MSP, WE RECEIVED TCAS TA FOLLOWED IMMEDIATELY BY RA WITH AN INDICATOR RED DOT 01-02 AND AUDIO, 'TFC CLB.' WE STARTED CLB ABOVE G/S AN ASKED TWR IF THEY HAD TFC. THEY REPLIED NEGATIVE. (THEY SAID ONLY TFC WAS AN SMT ON RWY 11R. WE ALSO COULD SEE IT.) AN ACR ACFT BEHIND US RPTED AN SMA Y AT APPROX 2400'. THEIR ACFT WAS NOT TCAS EQUIPPED.

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.

Air carrier large transport flight crew experiences altitude deviation on approach to msp due TCAS RA.