Air carrier receives TCASII RA. Responds.

Attributes
ACN	181358
Time
Date	199106
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : dca
State Reference	DC
Altitude	msl bound lower : 17000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent other
Route In Use	arrival other enroute airway : zdc
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 5200 flight time type : 350
ASRS Report	181358
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : private pilot : commercial pilot : flight engineer
Experience	flight time last 90 days : 300 flight time total : 700 flight time type : 300
ASRS Report	181363
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Descended on burki arrival to dca with clearance to cross druzz intersection at 15000'. We were 12-15 west of druzz at 19000', descending. We received ATC VFR traffic, 12 O'clock, 16500', and we did not receive the distance. We had no visibility on the VFR traffic and a few seconds later we received a TCAS traffic advisory, followed by an RA to reduce descent rate. When we completed, we advised ATC and he issued a clearance to level at 17000'. We did this. Seconds later TCAS reported clear traffic. Then cleared to 15000'.

Original NASA ASRS Text

Title: ACR RECEIVES TCASII RA. RESPONDS.

Narrative: DSNDED ON BURKI ARR TO DCA WITH CLRNC TO CROSS DRUZZ INTXN AT 15000'. WE WERE 12-15 W OF DRUZZ AT 19000', DSNDING. WE RECEIVED ATC VFR TFC, 12 O'CLOCK, 16500', AND WE DID NOT RECEIVE THE DISTANCE. WE HAD NO VIS ON THE VFR TFC AND A FEW SECS LATER WE RECEIVED A TCAS TFC ADVISORY, FOLLOWED BY AN RA TO REDUCE DSNT RATE. WHEN WE COMPLETED, WE ADVISED ATC AND HE ISSUED A CLRNC TO LEVEL AT 17000'. WE DID THIS. SECS LATER TCAS RPTED CLR TFC. THEN CLRED TO 15000'.

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.