An air carrier medium large transport climbed in response to a TCASII command.

Attributes
ACN	245039
Time
Date	199306
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : gep airport : msp
State Reference	MN
Altitude	msl bound lower : 9000 msl bound upper : 9400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
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 : 11600 flight time type : 8200
ASRS Report	245039
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
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 other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 700
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Level at 9000 ft, TCASII issued a TA for traffic 12 O'clock, 300 ft below our altitude. Almost immediately, received an RA. Initiated immediate climb. First officer spotted aircraft as we began climb. Notified ATC, who then issued TA. RA changed to 'monitor vertical speed' at 9400 ft, leveled off. TCASII called clear of traffic. Descended back to 9000 ft. TCASII worked as advertised.

Original NASA ASRS Text

Title: AN ACR MLG CLBED IN RESPONSE TO A TCASII COMMAND.

Narrative: LEVEL AT 9000 FT, TCASII ISSUED A TA FOR TFC 12 O'CLOCK, 300 FT BELOW OUR ALT. ALMOST IMMEDIATELY, RECEIVED AN RA. INITIATED IMMEDIATE CLB. FO SPOTTED ACFT AS WE BEGAN CLB. NOTIFIED ATC, WHO THEN ISSUED TA. RA CHANGED TO 'MONITOR VERT SPD' AT 9400 FT, LEVELED OFF. TCASII CALLED CLR OF TFC. DSNDED BACK TO 9000 FT. TCASII WORKED AS ADVERTISED.

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.