Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 151
Situational Awareness; Distraction
Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Unstabilized Approach
Air Traffic Control Issued Advisory / Alert; Flight Crew FLC complied w / Automation / Advisory
Human Factors; Procedure
We were cleared for a visual to 31L off a right downwind. Preceding aircraft reported a very near miss with a drone at 500 AGL on 31L. We were intently looking for the drone. First error was lining up on 31R. Tower queried us about our alignment at four miles and we sidestepped to 31L. We continued to configure while looking for the drone. I called for flaps 30. PM set flaps 25. We were both outside looking for the drone below 1000 ft. 'Too Low Flaps' alert. We configured flaps 30 and landed.
Air carrier First Officer reported being distracted by a reported UAV in the area of Runway 31L at DAL; missed setting flaps 30 and received a 'Too Low Flaps' alert. Crew set flaps and landed uneventfully.