Method and apparatus for an improved autopilot system providing for late runway change
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United States of America Patent
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Jun 4, 1996
Grant Date -
N/A
app pub date -
Aug 5, 1994
filing date -
Aug 5, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improvement to an autopilot flight director system allows the flight crew to make a late runway change without disengaging the autopilot. The improved system allows a transition to a new runway assignment if radio altitude is greater than 1500 feet. Control logic determines whether or not localizer and/or glideslope have been captured and enters predetermined modes as a function thereof to effect a transition to the new approach while enabling instrument landing system retuning while maintaining autopilot engagement. Flight crew workload during approach is significantly reduced as a result of implementation of the improved system.
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