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

Attributes
ACN	232459
Time
Date	199301
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dca
State Reference	DC
Altitude	msl bound lower : 3700 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : dca
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 120 flight time total : 9000 flight time type : 120
ASRS Report	232459
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 170 flight time total : 8500 flight time type : 6000
ASRS Report	232455
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action none taken : anomaly accepted
Consequence	Other
Miss Distance	vertical : 300
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

Cleared for river 18 visual. TCASII advisory 'traffic' followed by 'climb, crossing traffic.' TCASII indicated minimum 2000 FPM climb. Began climb at 3700 ft (approximately), climbed to 4500 ft. Clear of conflict. Resumed approach without further incident. ATC never advised of any traffic. Never saw target visually.

Original NASA ASRS Text

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

Narrative: CLRED FOR RIVER 18 VISUAL. TCASII ADVISORY 'TFC' FOLLOWED BY 'CLB, XING TFC.' TCASII INDICATED MINIMUM 2000 FPM CLB. BEGAN CLB AT 3700 FT (APPROX), CLBED TO 4500 FT. CLR OF CONFLICT. RESUMED APCH WITHOUT FURTHER INCIDENT. ATC NEVER ADVISED OF ANY TFC. NEVER SAW TARGET VISUALLY.

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.