Medium Transport; Low Wing; 2 Turbojet Eng
Distraction; Situational Awareness; Time Pressure; Workload
Airspace Violation All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Unauthorized Flight Operations (UAS); Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors; Environment - Non Weather Related
During level flight at 2;000; within the terminal area of HEF & inbound on radar vectors to the RNAV 34 approach; we experienced a TCAS RA. I; the First Officer; am Pilot Flying and the TCAS directed us with the aural warnings of 'TRAFFIC; TRAFFIC'. Just in my scanning of the terrain; I saw a small drone fly into my visual field. I was unable to tell how close it was before the TCAS system announced  'CLIMB' along with a red target on the display & a red Vertical Speed Arrow directing a 3;000+ feet per minute climb. At the top of the arrow was a green 'fly-to' cue.  I took evasive action to climb above and called that It looks like its a drone.Immediately after the event was resolved;  I safely flew the back to our assigned altitude of 2;000. Shortly thereafter; we acquired the airport (HEF) visually & proceeded with a visual approach to Runway 34 without any further incident & zero delays to the mission.
Fractional jet crew received a TCAS RA due to a UAS and took evasive action following TCAS RA guidance.