EGPWS Functions and Features
KTA 970/KMH 980 Pilot’s Guide
Rev 2
006-18273-0000
51
Initially, the voice alert “Sink Rate” will be heard, and the yellow caution
alert annunciator lamp will illuminate. If the aircraft continues in the high
rate of descent, the “Sink Rate-Sink Rate” voice alert will be repeated at
an increasing frequency.
Should the aircraft penetrate the warning boundary, the voice alert “Pull
Up” will be heard continuously and the red warning annunciator lamp will
illuminate.
In both cases, as the pilot reacts to decrease the high rate of descent
and the aircraft flight path exits the alerting/warning envelope, the annun-
ciator lamp will extinguish and the voice alerts will cease.
Sometimes, the alerting and warning functionality for excessive rate of
descent may be overridden by the terrain “Look-Ahead” functionality.
This is normal as the “Look-Ahead” function has a higher priority in the
system alerting/warning logic. (See the Alerting/Warning Priority chart
later in this guide.)
INADVERTENT DESCENT / LOSS OF ALTITUDE AFTER
TAKE-OFF
The GA-EGPWS uses known runway position and elevation information
to monitor altitude during take-off and initial climb. This function is active
until the aircraft reaches an altitude of approximately 700 feet above the
runway elevation used for take-off.
Should the aircraft experience an inadvertent descent or loss of altitude
after take-off, the system will illuminate the yellow caution annunciator
lamp and provide “Don’t Sink-Don’t Sink” voice alerts to the pilot. The
voice alerts will be repeated with increasing frequency.
The following graph shows this alerting envelope:
Descent After Takeoff
