A B727 has to take action to avoid a cessna in the traffic pattern.

Attributes
ACN	599476
Time
Date	200311
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ilg.airport
State Reference	DE
Altitude	agl single value : 1700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : phl.tracon tower : ilg.tower
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 125
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : ilg.tower
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi pilot : atp
Experience	flight time last 90 days : 120 flight time total : 21700 flight time type : 580
ASRS Report	599476
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 500
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance
Primary Problem	Ambiguous

Narrative:

As we were turning from downwind to base for runway 1, after being cleared for the visual approach and being turned over to the tower, the flight engineer spotted an aircraft approaching from about the 9 O'clock position on a southwest track as we were in the turn. I altered course to the right and the other pilot then went to the left. We advised the tower. The tower called the aircraft by his n-number and said 'I thought you said you were going southwest,' to which the pilot replied, 'I am going southwest.' nothing more was said.

Original NASA ASRS Text

Title: A B727 HAS TO TAKE ACTION TO AVOID A CESSNA IN THE TFC PATTERN.

Narrative: AS WE WERE TURNING FROM DOWNWIND TO BASE FOR RWY 1, AFTER BEING CLRED FOR THE VISUAL APCH AND BEING TURNED OVER TO THE TWR, THE FE SPOTTED AN ACFT APCHING FROM ABOUT THE 9 O'CLOCK POS ON A SW TRACK AS WE WERE IN THE TURN. I ALTERED COURSE TO THE R AND THE OTHER PLT THEN WENT TO THE L. WE ADVISED THE TWR. THE TWR CALLED THE ACFT BY HIS N-NUMBER AND SAID 'I THOUGHT YOU SAID YOU WERE GOING SW,' TO WHICH THE PLT REPLIED, 'I AM GOING SW.' NOTHING MORE WAS SAID.

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.