A potential conflict between an en route blimp and a DC8 flight on the localizer at sdf, ky.

Attributes
ACN	509950
Time
Date	200105
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : sdf.airport
State Reference	KY
Altitude	msl single value : 3000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	DC-8 70
Flight Phase	descent : approach
Route In Use	approach : visual
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : sdf.tracon
Make Model Name	Balloon
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : multi engine pilot : instrument pilot : atp pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 4800 flight time type : 20
ASRS Report	509950
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared for visual approach. On extended centerline blimp was climbing. We were cleared for a visual approach. Blimp started to descend. Our aircraft was in level flight. We passed the blimp and descended for normal touchdown and landing.

Original NASA ASRS Text

Title: A POTENTIAL CONFLICT BTWN AN ENRTE BLIMP AND A DC8 FLT ON THE LOC AT SDF, KY.

Narrative: CLRED FOR VISUAL APCH. ON EXTENDED CTRLINE BLIMP WAS CLBING. WE WERE CLRED FOR A VISUAL APCH. BLIMP STARTED TO DSND. OUR ACFT WAS IN LEVEL FLT. WE PASSED THE BLIMP AND DSNDED FOR NORMAL TOUCHDOWN AND LNDG.

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.