MD-80 Series (DC-9-80) Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 10889
Distraction
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Returned To Clearance
Human Factors
I was the Pilot Monitoring. During this approach in daylight; Pilot Flying disconnected the autopilot and descended at the final approach fix. The aircraft descended below MDA [Minimum Descent Altitude] (400 feet MSL) and Pilot Monitoring informed of the altitude and Pilot Flying adjusted pitch and power to return to MDA. At the same time; we received an aural 'obstacle' and we were in the clear with the airport in sight and executed a normal landing. Instrument cross-check. As the Pilot Monitoring; paying more attention to the descent to MDA as opposed to cross checking the approach chart too much.
I was Pilot Flying [a] daylight approach. I disconnected autopilot and manually flew approach. We descended below MDA [Minimum Descent Altitude] 400 feet MSL. Pilot Monitoring called below MDA and I corrected back up toward MDA with aural obstacle warning; and seconds later; we broke out in clear for visual landing. I disconnected autopilot because of aircraft wobble on localizer and should have kept autopilot on.
MD-83 flight crew reported descending below the MDA while hand flying an ILS approach to MSY airport.