Originally Posted by
Airbubba
...According to the NTSB briefing the autopilot was on until one second before the end of the DFDR data. As others have noted, it would normally automatically disconnect at 50 feet below the D-DA of 1250 feet
Somehow, the plane thought it was still above 50 feet below the D-DA entered on the approach page of the FMS.
Would it be possible to enter an incorrect value for the MDA @IMTOY, e.g. typo 1-2-0 or 2-0-0 instead of 1-2-0-0, and the autopilot would try to fly that profile? What are the typical safeguards or controls to prevent an incorrect data entry?