B777 flight crew reports sighting a drone in iad class B airspace during approach.

Attributes
ACN	1176559
Time
Date	201406
Local Time Of Day	1201-1800
Place
Locale Reference	IAD.Airport
State Reference	DC
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	UAV - Unpiloted Aerial Vehicle
Person 1
Function	Pilot Flying First Officer
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 14500 Flight Crew Type 5000
Person 2
Function	Pilot Not Flying Relief Pilot First Officer
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 16000 Flight Crew Type 5000
Events
Anomaly	Conflict NMAC

Narrative:

Approaching domse on visual approach to [runway] 19L at iad; descending through 1;800 MSL an object was spotted at 12:30 position tracking straight on slightly below our altitude. As it passed by the right side of the aircraft approximately 100 ft and below our altitude by 100 ft it became apparent that it was a drone of some sort approximately 4 ft in diameter; saucer shaped; and gold or bronze in color. I made a comment to the other two pilots in the flight deck that it appeared to be a drone. The captain reported our sighting to the tower and the rest of the approach was continued without incident.

Original NASA ASRS Text

Title: B777 flight crew reports sighting a drone in IAD Class B airspace during approach.

Narrative: Approaching DOMSE on visual approach to [Runway] 19L at IAD; descending through 1;800 MSL an object was spotted at 12:30 position tracking straight on slightly below our altitude. As it passed by the right side of the aircraft approximately 100 FT and below our altitude by 100 FT it became apparent that it was a drone of some sort approximately 4 FT in diameter; saucer shaped; and gold or bronze in color. I made a comment to the other two pilots in the flight deck that it appeared to be a drone. The Captain reported our sighting to the Tower and the rest of the approach was continued without incident.

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.