Close proximity air carrier-lga GA-small transport above dca TCA.

Attributes
ACN	111791
Time
Date	198905
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dca
State Reference	DC
Altitude	msl bound lower : 10200 msl bound upper : 10400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : dca
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
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
Experience	flight time last 90 days : 250
ASRS Report	111791
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

Passing approximately 10,200' on radar vectors for climb to 17,000', a white twin passed directly overhead about 200' or less separation. Washington departure called pop up traffic right at the moment the traffic passed. The controller reported the aircraft as not being transponder equipped and not in radio contact.

Original NASA ASRS Text

Title: CLOSE PROX ACR-LGA GA-SMT ABOVE DCA TCA.

Narrative: PASSING APPROX 10,200' ON RADAR VECTORS FOR CLIMB TO 17,000', A WHITE TWIN PASSED DIRECTLY OVERHEAD ABOUT 200' OR LESS SEPARATION. WASHINGTON DEP CALLED POP UP TFC RIGHT AT THE MOMENT THE TFC PASSED. THE CTLR REPORTED THE ACFT AS NOT BEING TRANSPONDER EQUIPPED AND NOT IN RADIO CONTACT.

Data retrieved from NASA's ASRS site as of August 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.