B767-200
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Distraction
Conflict NMAC
Aircraft
While transitioning from the RNAV arrival to the approach; a UAS passed directly under us; probably within a couple hundred feet. The First Officer saw it; and could not identify what kind or exactly the size; but saw a glint of metal; said it seemed maybe several feet in diameter. No indications showed up on the TCAS. We were leveling off at 5;000 feet heading west. We reported the sighting to ATC; and responded to their questions in stages (workload permitting).
An air carrier pilot reported a NMAC with a UAS.