Narrative:

Approximately 50 miles from mci; center cleared us direct to mazou FAF 19L and a descend 8;000 feet. After being handed off to approach we were cleared to 4;000 feet and shortly after that cleared for the visual approach. Auto tune was performed successfully. Approximately 15 nautical miles north east of the airport descending from 4;000 to 2;600 feet and we were cleared for the visual approach. We were LNAV with 2;600 feet in altitude select. The first officer then armed approach and shortly after that the flight guidance captured a false localizer and made an immediate left turn to a southerly heading. The first officer disengaged the auto pilot and began hand flying the aircraft back on course towards the outer marker. After the autopilot was disconnected I noticed the flight director had dropped off. I was unable to bring the flight director back online until we intercepted the localizer over the outer marker. We discussed that if a normal stable approach was not possible; we would execute a go-around. A normal approach and landing was made. There were no notams for the ILS approach. Disconnecting automation and hand flying was essential for maintaining safe aircraft operation. In the future I will make a habit of more hand flying and encourage my first officers to do the same.

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Original NASA ASRS Text

Title: Air carrier flight crew reported they lost the localizer signal while conducting a Visual Approach to MCI airport.

Narrative: Approximately 50 miles from MCI; Center cleared us direct to MAZOU FAF 19L and a descend 8;000 feet. After being handed off to Approach we were cleared to 4;000 feet and shortly after that cleared for the Visual Approach. Auto tune was performed successfully. Approximately 15 nautical miles north east of the airport descending from 4;000 to 2;600 feet and we were cleared for the Visual Approach. We were LNAV with 2;600 feet in altitude select. The First Officer then armed approach and shortly after that the flight guidance captured a false localizer and made an immediate left turn to a southerly heading. The First Officer disengaged the auto pilot and began hand flying the aircraft back on course towards the outer marker. After the autopilot was disconnected I noticed the flight director had dropped off. I was unable to bring the flight director back online until we intercepted the localizer over the outer marker. We discussed that if a normal stable approach was not possible; we would execute a go-around. A normal approach and landing was made. There were no NOTAMs for the ILS approach. Disconnecting automation and hand flying was essential for maintaining safe aircraft operation. In the future I will make a habit of more hand flying and encourage my First Officers to do the same.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.