Air carrier makes go around as small transport lines up for same runway. TCASII alert.

Attributes
ACN	248925
Time
Date	199308
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tul
State Reference	OK
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tul
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	descent : approach landing : go around other
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial pilot : flight engineer pilot : instrument
Experience	flight time last 90 days : 239 flight time total : 7326 flight time type : 4126
ASRS Report	248925
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : took evasive action other
Consequence	Other
Miss Distance	horizontal : 300 vertical : 300
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

During a left base to runway 18L, our TCASII alerted us to a potential conflict. We sighted small transport high and to our right, converging with our flight path. We continued our approach to runway 18L with no overshoot from the extended centerline of runway 18L. Upon realizing that the small transport was indeed lining up to land on our runway, we broke out of the pattern to the left (east). After circling, our landing was uneventful. After our breakout, the small transport acknowledged that he was cleared to land on runway 18L. He had actually been cleared to land runway 18R. It is always to our best interest to keep our heads up and fly defensively.

Original NASA ASRS Text

Title: ACR MAKES GAR AS SMT LINES UP FOR SAME RWY. TCASII ALERT.

Narrative: DURING A L BASE TO RWY 18L, OUR TCASII ALERTED US TO A POTENTIAL CONFLICT. WE SIGHTED SMT HIGH AND TO OUR R, CONVERGING WITH OUR FLT PATH. WE CONTINUED OUR APCH TO RWY 18L WITH NO OVERSHOOT FROM THE EXTENDED CTRLINE OF RWY 18L. UPON REALIZING THAT THE SMT WAS INDEED LINING UP TO LAND ON OUR RWY, WE BROKE OUT OF THE PATTERN TO THE L (E). AFTER CIRCLING, OUR LNDG WAS UNEVENTFUL. AFTER OUR BREAKOUT, THE SMT ACKNOWLEDGED THAT HE WAS CLRED TO LAND ON RWY 18L. HE HAD ACTUALLY BEEN CLRED TO LAND RWY 18R. IT IS ALWAYS TO OUR BEST INTEREST TO KEEP OUR HEADS UP AND FLY DEFENSIVELY.

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.