Aircraft on final came in close proximity to another aircraft on downwind for a different runway.

Attributes
ACN	128281
Time
Date	198911
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dec
State Reference	IL
Altitude	msl bound lower : 2000 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dec
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	landing other
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : instrument
Experience	flight time last 90 days : 230 flight time total : 4100 flight time type : 2300
ASRS Report	128281
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

Flight cleared for visual approach to runway 24 by approach control. Approach control handed aircraft off to local controller. Aircraft cleared to land and was issued VFR traffic at 1 O'clock position 8 mi entering left base runway 18. On approximately 5 mi final captain asked name of town just below aircraft. A male voice answered name of town and then said 'they are right behind me'. At that time first officer observed single engine small aircraft passing off right side of aircraft 1 O'clock position. At the same time the small aircraft reported our aircraft in sight and turned towards the north. Callback conversation with reporter revealed the following: callback revealed that the small aircraft was less than 1 mi away when he crossed the reporter's aircraft. He did not see the aircraft until the last min, but doesn't think it was real close. The local controller had issued traffic and he believes instructed the small aircraft to go behind his aircraft. Since no address was given in the report, this analyst obtained it from the reporter.

Original NASA ASRS Text

Title: ACFT ON FINAL CAME IN CLOSE PROX TO ANOTHER ACFT ON DOWNWIND FOR A DIFFERENT RWY.

Narrative: FLT CLRED FOR VISUAL APCH TO RWY 24 BY APCH CTL. APCH CTL HANDED ACFT OFF TO LCL CTLR. ACFT CLRED TO LAND AND WAS ISSUED VFR TFC AT 1 O'CLOCK POSITION 8 MI ENTERING LEFT BASE RWY 18. ON APPROX 5 MI FINAL CAPT ASKED NAME OF TOWN JUST BELOW ACFT. A MALE VOICE ANSWERED NAME OF TOWN AND THEN SAID 'THEY ARE RIGHT BEHIND ME'. AT THAT TIME F/O OBSERVED SINGLE ENGINE SMA PASSING OFF RIGHT SIDE OF ACFT 1 O'CLOCK POSITION. AT THE SAME TIME THE SMA REPORTED OUR ACFT IN SIGHT AND TURNED TOWARDS THE NORTH. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: CALLBACK REVEALED THAT THE SMA WAS LESS THAN 1 MI AWAY WHEN HE CROSSED THE REPORTER'S ACFT. HE DID NOT SEE THE ACFT UNTIL THE LAST MIN, BUT DOESN'T THINK IT WAS REAL CLOSE. THE LCL CTLR HAD ISSUED TFC AND HE BELIEVES INSTRUCTED THE SMA TO GO BEHIND HIS ACFT. SINCE NO ADDRESS WAS GIVEN IN THE REPORT, THIS ANALYST OBTAINED IT FROM THE RPTR.

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.