Medium large transport has near midair collision with small aircraft on approach.

Attributes
ACN	270974
Time
Date	199405
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : bwi
State Reference	MD
Altitude	msl bound lower : 500 msl bound upper : 500
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tower : bwi
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 175 flight time total : 15500 flight time type : 9000
ASRS Report	270974
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 300 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On approach to bwi from the northwest, approach cleared us for VFR approach to runway 33L. We were late in running checklist and first officer had his head in cockpit. On downwind, I had the airport and entered a base for runway 28 instead of runway 33L. I had the ILS dialed in but ignored it. TCASII alerted us to a small aircraft to our right turning base to final thinking I was aligned with 33L, I felt he was going to 33R. In reality, I was lined up with runway 28 and he was turning final for 28 also. When I saw him converging with us, I initiated a go around to the left and re-entered a left base for 33L. With the TCASII yelling at us, tower kept asking the light aircraft if he had us in sight, and I believe (tower) cleared us to land on runway 28 when they realized what had happened. After landing, I talked with tower and they said everyone was safe and that as far as they were concerned, it was over. All I can say is I sure learned from it.

Original NASA ASRS Text

Title: MLG HAS NMAC WITH SMA ON APCH.

Narrative: ON APCH TO BWI FROM THE NW, APCH CLRED US FOR VFR APCH TO RWY 33L. WE WERE LATE IN RUNNING CHKLIST AND FO HAD HIS HEAD IN COCKPIT. ON DOWNWIND, I HAD THE ARPT AND ENTERED A BASE FOR RWY 28 INSTEAD OF RWY 33L. I HAD THE ILS DIALED IN BUT IGNORED IT. TCASII ALERTED US TO A SMALL ACFT TO OUR R TURNING BASE TO FINAL THINKING I WAS ALIGNED WITH 33L, I FELT HE WAS GOING TO 33R. IN REALITY, I WAS LINED UP WITH RWY 28 AND HE WAS TURNING FINAL FOR 28 ALSO. WHEN I SAW HIM CONVERGING WITH US, I INITIATED A GAR TO THE L AND RE-ENTERED A L BASE FOR 33L. WITH THE TCASII YELLING AT US, TWR KEPT ASKING THE LIGHT ACFT IF HE HAD US IN SIGHT, AND I BELIEVE (TWR) CLRED US TO LAND ON RWY 28 WHEN THEY REALIZED WHAT HAD HAPPENED. AFTER LNDG, I TALKED WITH TWR AND THEY SAID EVERYONE WAS SAFE AND THAT AS FAR AS THEY WERE CONCERNED, IT WAS OVER. ALL I CAN SAY IS I SURE LEARNED FROM IT.

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.