Commuter aircraft has near midair collision with small aircraft inside class B airspace.

Attributes
ACN	307742
Time
Date	199506
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bwi
State Reference	MD
Altitude	msl bound lower : 4500 msl bound upper : 4500
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : bwi
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 15000 flight time type : 4500
ASRS Report	307742
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : nmac
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 250
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During climb out of bwi, with hazy conditions, a high winged aircraft (cessna) appeared off the left wing, slightly lower than our altitude (we were climbing at 1000 FPM) the other aircraft was headed south at what appeared to be level flight conditions. My first officer was the PF, our aircraft was on autoplt. We had just executed a slight right turn as directed by ATC to put us more on course towards lancaster. We had no warning from ATC and did not have time to take evasive action. ATC later said they had a primary target (after we told them of the aircraft) and they alerted other aircraft climbing out of bwi. We had TCASII on board, but the aircraft had no transponder turned on.

Original NASA ASRS Text

Title: COMMUTER ACFT HAS NMAC WITH SMA INSIDE CLASS B AIRSPACE.

Narrative: DURING CLB OUT OF BWI, WITH HAZY CONDITIONS, A HIGH WINGED ACFT (CESSNA) APPEARED OFF THE L WING, SLIGHTLY LOWER THAN OUR ALT (WE WERE CLBING AT 1000 FPM) THE OTHER ACFT WAS HEADED S AT WHAT APPEARED TO BE LEVEL FLT CONDITIONS. MY FO WAS THE PF, OUR ACFT WAS ON AUTOPLT. WE HAD JUST EXECUTED A SLIGHT R TURN AS DIRECTED BY ATC TO PUT US MORE ON COURSE TOWARDS LANCASTER. WE HAD NO WARNING FROM ATC AND DID NOT HAVE TIME TO TAKE EVASIVE ACTION. ATC LATER SAID THEY HAD A PRIMARY TARGET (AFTER WE TOLD THEM OF THE ACFT) AND THEY ALERTED OTHER ACFT CLBING OUT OF BWI. WE HAD TCASII ON BOARD, BUT THE ACFT HAD NO XPONDER TURNED ON.

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.