Airbus Industrie Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Total 17000
Communication Breakdown; Distraction; Workload; Time Pressure; Situational Awareness; Fatigue
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Unstabilized Approach; Inflight Event / Encounter Weather / Turbulence
Flight Crew Became Reoriented; Flight Crew FLC complied w / Automation / Advisory
Human Factors; Weather
MMMX airport. Cleared and flying ILS 2 05R. Everything coming together wonderfully for approach; crossing PLAZA on GS on Loc. Missed approach altitude set flaps 2 gear down. We received a wind shear latest from Tower prior to PLAZA; and change from flaps full to flaps 3 configuration. Switch to Tower and Approach gave us the wrong frequency. At that time I called for flaps 3. As Pilot Flying I was focused on maintaining GS; pitch; and approach speed. And preparing for a wind shear event. I asked for a the FO (First Officer) to adjust me to 143 kts; for V ref; as I was close to the hook. Passing 1;000 ft. I called; stable; we were trying to get the correct Tower frequency and run before landing checklist. At 1;000 ft.; we realized; before landing checklist had 2 blue items. To include flaps not set. We thought maybe the land flaps three button had not been pushed we checked and saw it had. I was still strongly focused on possible wind shear event; and finally at about 400 ft. the FO realized the flap handle and flaps had not been configured to 3.Fatigue for FO. End of a long 3 days; and 0300 wake up. I was mid sequence replacement; for his original Captain. Tower frequency miss assignment at critical spot on challenging approach. Wind shear warning; issued by tower which caused confusion during final stabilization phase. And lack of assertiveness and direction from me the Captain to know and instantly realize the improper checklist verbiage; and how to instantly correct and interpret the ramifications. Checklist and configuration should always be done prior to intercepting final approach course. Way too busy from that spot inbound. Especially when something extraneous like a potential wind shear is forecast.
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A319 flight crew reported a 'TOO LOW FLAPS' alert; an unstable approach condition and crew fatigue.