Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation - Altitude Overshoot; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Human Factors
Low altitude alert from AFW Tower during night visual approach to [Runway] 16L from the south. We entered a left downwind to [Runway] 16L; turned base early due to traffic ahead; and descended initially to 1;000 feet AGL. At the alert from ATC; we cross-checked our altitude; intercepted the glide path from below but inside the instrument FAF; and landed uneventfully. Turning earlier than what would have set us up at the instrument FAF and attempting to interpolate a visual descent path; cross cockpit; at night.
Set up for a left base at AFW at 1;500 feet AGL rolled off for the turn to final and slowly descended to 1;000 feet AGL to join up on the ILS glide slope for [Runway] 16L. During the rollout received a call from ATC saying they were getting an altitude alert and heck our altitude. At no point during the rollout did we go lower than 1;000 feet AGL and rolled out on final on glide path. Landing was uneventful. We were on a visual and turned inside the FAF for traffic. As a result we were lower than normal during the final turn.
Air carrier flight crew reported receiving a low-altitude warning during base leg of a visual approach to AFW airport.