Medium large transport got a TCASII RA and climbed as commanded.

Attributes
ACN	243432
Time
Date	199306
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bei
State Reference	MD
Altitude	msl bound lower : 11000 msl bound upper : 11500
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude cruise other cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer oversight : pic
Experience	flight time last 90 days : 215 flight time total : 9500 flight time type : 215
ASRS Report	243432
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 2000
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While being vectored for approach a TCASII warning went off advising us to climb to avoid another aircraft. We initiated the climb and complied with TCASII oral commands notifying ATC of our actions. Prior to the warnings we received numerous heading changes by approach control. We changed frequencys between the 2 required approach controls many times. We were also required to request some deviations during the time preceding the warning due to thunderstorms.

Original NASA ASRS Text

Title: MLG GOT A TCASII RA AND CLBED AS COMMANDED.

Narrative: WHILE BEING VECTORED FOR APCH A TCASII WARNING WENT OFF ADVISING US TO CLB TO AVOID ANOTHER ACFT. WE INITIATED THE CLB AND COMPLIED WITH TCASII ORAL COMMANDS NOTIFYING ATC OF OUR ACTIONS. PRIOR TO THE WARNINGS WE RECEIVED NUMEROUS HDG CHANGES BY APCH CTL. WE CHANGED FREQS BTWN THE 2 REQUIRED APCH CTLS MANY TIMES. WE WERE ALSO REQUIRED TO REQUEST SOME DEVS DURING THE TIME PRECEDING THE WARNING DUE TO TSTMS.

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.