EGPWS MODES PDF

Source: US FAA Description A Terrain Avoidance and Warning System TAWS is a safety net that automatically provides a distinctive warning to pilots when the their aeroplane is, based only on the radio altimeter reading and terrain closure rates derived therefrom, in potentially hazardous proximity to terrain. Subsequent improvements added aeroplane configuration e. However, it suffered from a significant limitation because it was dependent on the radio altimeter as the means to measure proximity to terrain which meant that there was insufficient time to avoid a sudden change in terrain in the form of steeply rising ground. A comprehensive set of reliable cautions and warnings can be generated which use both the radio altimeter and relative position.

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Source: US FAA Description A Terrain Avoidance and Warning System TAWS is a safety net that automatically provides a distinctive warning to pilots when the their aeroplane is, based only on the radio altimeter reading and terrain closure rates derived therefrom, in potentially hazardous proximity to terrain.

Subsequent improvements added aeroplane configuration e. However, it suffered from a significant limitation because it was dependent on the radio altimeter as the means to measure proximity to terrain which meant that there was insufficient time to avoid a sudden change in terrain in the form of steeply rising ground. A comprehensive set of reliable cautions and warnings can be generated which use both the radio altimeter and relative position.

In essence, Class A systems are required for all but the smallest commercial air transport aircraft, while Class B systems are required by larger General Aviation GA aircraft and recommended for smaller commercial or GA aircraft. Full details of regulatory requirements are given later in this article. The FLTA function looks ahead of the aircraft along and below its lateral and vertical flight path and provides suitable alerts if a potential CFIT threat exists.

An appropriate visual and aural discrete signal for both caution and warning alerts. The manufacturer may provide other functions in addition to the above. Aircraft Equipment Aircraft equipment operated by the pilot comprises: A control and indicator unit. The control and indicator unit contains, as a minimum, two lights: a red light to indicate a hard warning imminent danger and an amber light to indicate an alert soft warning or caution.

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Enhanced Ground Proximity Warning System

A CFIT accident is one where a properly functioning airplane under the control of a fully qualified and certified crew is flown into terrain, water or obstacles with no apparent awareness on the part of the crew. As a result of these studies and recommendations from the U. FAA amended operating rules to require that all U. A report stated that from , when the U.

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