ASRS 2093255

Reporter 1

We were just vectored onto the final approach course for the ILS Z Runway X approach at ZZZ. We were descending to meet the 1500 ft. altitude at ZZZZZ intersection. The flight director did not capture the altitude and to correct the pilot flying ended up disconnecting the flight director and hand flying back to the glide slope between ZZZZZ and ZZZZZ1 to continue the ILS approach. We descended about 230 ft. below the 1500 ft. required altitude before starting the climb back up. We did get an altitude alert from the controller and were asked if we wanted to continue the approach. We told him we were correcting and would like to continue. We reengaged the flight director after climbing back onto the glide slope and continued the approach. Closely monitor the flight director and have your hands on the controls so that you may take immediate action before any altitude deviations can take place.

Reporter 2

We had just been vectored onto the final approach course for the ILS Z Runway X at ZZZ. We were descending from 1700 to 1500 for ZZZZZ fix. The flight director did not capture the 1500 ft. altitude I disconnected the flight director to hand fly us back to 1500 ft. We continued onto ZZZZZ and then to ZZZZZ1 for the glide slope. Approach said they got an altitude alert and asked if we wanted to continue the approach. We told them we had corrected and would like to continue the approach. I reengaged the flight director and continued the approach without anymore deviations. Have hands on the controlls at all times during approach phase, and during any altitude capture phase. Have focus on instrumentation, and ask the Pilot Not Flying for any questions on approach chart.