LJ60 captain reports sighting a uav at 5;000 feet while on downwind for runway 18L at cvg.

Attributes
ACN	1257390
Time
Date	201504
Local Time Of Day	1201-1800
Place
Locale Reference	CVG.Airport
State Reference	KY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Learjet 60
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 14600 Flight Crew Type 500
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 8000 Flight Crew Type 1500
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 100 Vertical 50

Narrative:

We were at 7000 feet MSL; approximately 4 nm from the approach end of cvg runway 18L on the downwind leg; and had just received a vector for left base and descent to 4000 in preparation for a visual approach to runway 18L. As I began the turn and descent; a red and black squarish vehicle appeared on our right; approximately 100 feet at our one to two o'clock (in the turn;) about 50 feet above us in the descending turn. It was southbound; so I did not get a long look; but I would guess it was a quadcopter.

Original NASA ASRS Text

Title: LJ60 Captain reports sighting a UAV at 5;000 feet while on downwind for Runway 18L at CVG.

Narrative: We were at 7000 feet MSL; approximately 4 nm from the approach end of CVG runway 18L on the downwind leg; and had just received a vector for left base and descent to 4000 in preparation for a visual approach to runway 18L. As I began the turn and descent; a red and black squarish vehicle appeared on our right; approximately 100 feet at our one to two o'clock (in the turn;) about 50 feet above us in the descending turn. It was southbound; so I did not get a long look; but I would guess it was a quadcopter.

Data retrieved from NASA's ASRS site 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.