An air carrier light transport climbed in response to a TCASII command. The traffic was in sight.

Attributes
ACN	232369
Time
Date	199301
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bwi
State Reference	MD
Altitude	msl bound lower : 3000 msl bound upper : 3300
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent 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 : 240 flight time total : 5200 flight time type : 2800
ASRS Report	232369
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation other

Narrative:

Controller advised of traffic. I called traffic in sight but could not tell direction of flight. TCASII gave climb command. We started a climb and controller questioned us on our actions. We stated that since TCASII gave command to climb, we did. He stated he didn't think it was necessary if we had traffic in sight.

Original NASA ASRS Text

Title: AN ACR LTT CLBED IN RESPONSE TO A TCASII COMMAND. THE TFC WAS IN SIGHT.

Narrative: CTLR ADVISED OF TFC. I CALLED TFC IN SIGHT BUT COULD NOT TELL DIRECTION OF FLT. TCASII GAVE CLB COMMAND. WE STARTED A CLB AND CTLR QUESTIONED US ON OUR ACTIONS. WE STATED THAT SINCE TCASII GAVE COMMAND TO CLB, WE DID. HE STATED HE DIDN'T THINK IT WAS NECESSARY IF WE HAD TFC IN SIGHT.

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.