Air carrier has near midair collision during climb out.

Attributes
ACN	183546
Time
Date	199107
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : bwi
State Reference	MD
Altitude	msl bound lower : 16500 msl bound upper : 16700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute airway : j510
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 160 flight time total : 6000 flight time type : 800
ASRS Report	183546
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	conflict : nmac
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 1500
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Climb on J-510 bwi to ihd. Cleared by washington approach to 17000 ft. At about 15000 ft was switched over to washington center. Upon chkin at about 15500, washington center called back 'roger, VFR traffic 11 to 12 O'clock (or 12 to 1 O'clock?) reported (or readout) altitude 16500 ft'. This was our first notification of this traffic. First officer (PF) saw traffic converging 60 degree to 90 degree right to left, at about (16300 ft out altitude) 16500. First officer banked to left at 16500 to 16700 and the light aircraft (small transport) passed behind us at the same altitude and 100 ft to 200 ft horizontal separation. 30 degree bank was used to avoid the traffic. This traffic was VFR, squawking 1200 not in radio contact with washington approach or washington center, but was talking to leesburg FSS. Recommendation to prevent recurrence: washington approach control (if the traffic was visible on their screen) could have given us a heads up of the traffic prior to handoff to washington center. Note: washington center, when checking in with them, gave the immediate traffic alert callout and this in effect prevented the possible midair.)

Original NASA ASRS Text

Title: ACR HAS NMAC DURING CLBOUT.

Narrative: CLB ON J-510 BWI TO IHD. CLRED BY WASHINGTON APCH TO 17000 FT. AT ABOUT 15000 FT WAS SWITCHED OVER TO WASHINGTON CENTER. UPON CHKIN AT ABOUT 15500, WASHINGTON CENTER CALLED BACK 'ROGER, VFR TFC 11 TO 12 O'CLOCK (OR 12 TO 1 O'CLOCK?) RPTED (OR READOUT) ALT 16500 FT'. THIS WAS OUR FIRST NOTIFICATION OF THIS TFC. FO (PF) SAW TFC CONVERGING 60 DEG TO 90 DEG R TO L, AT ABOUT (16300 FT OUT ALT) 16500. FO BANKED TO L AT 16500 TO 16700 AND THE LIGHT ACFT (SMT) PASSED BEHIND US AT THE SAME ALT AND 100 FT TO 200 FT HORIZ SEPARATION. 30 DEG BANK WAS USED TO AVOID THE TFC. THIS TFC WAS VFR, SQUAWKING 1200 NOT IN RADIO CONTACT WITH WASHINGTON APCH OR WASHINGTON CENTER, BUT WAS TALKING TO LEESBURG FSS. RECOMMENDATION TO PREVENT RECURRENCE: WASHINGTON APCH CTL (IF THE TFC WAS VISIBLE ON THEIR SCREEN) COULD HAVE GIVEN US A HEADS UP OF THE TFC PRIOR TO HANDOFF TO WASHINGTON CENTER. NOTE: WASHINGTON CENTER, WHEN CHKING IN WITH THEM, GAVE THE IMMEDIATE TFC ALERT CALLOUT AND THIS IN EFFECT PREVENTED THE POSSIBLE MIDAIR.)

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.