Potential conflict on final approach course.

Attributes
ACN	270627
Time
Date	199404
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sdf
State Reference	KY
Altitude	msl bound lower : 4000 msl bound upper : 4000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : sdf
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	cruise other descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 230 flight time total : 3400 flight time type : 300
ASRS Report	270627
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 5000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation Operational Error

Narrative:

While already established on the localizer per ATC instruction, an air carrier md-80 was vectored in front of us to join the localizer at the marker. I turned left and decided to pass behind the md-80. The controller said that the md-80 had slowed sooner than anticipated.

Original NASA ASRS Text

Title: POTENTIAL CONFLICT ON FINAL APCH COURSE.

Narrative: WHILE ALREADY ESTABLISHED ON THE LOC PER ATC INSTRUCTION, AN ACR MD-80 WAS VECTORED IN FRONT OF US TO JOIN THE LOC AT THE MARKER. I TURNED L AND DECIDED TO PASS BEHIND THE MD-80. THE CTLR SAID THAT THE MD-80 HAD SLOWED SOONER THAN ANTICIPATED.

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.