82046-PG-B1
ST3400H PILOT’S GUIDE
Page 7-2
7.4
Mode 4 – Landing Gear
For retractable gear aircraft - A “TOO LOW GEAR” Caution Alert is
generated if the aircraft descends below 125’ while in the Normal
Sensitivity mode (or below 50’ while in the Low Sensitivity mode) and the
landing gear is not down.
Figure 7-3 GPWS Mode 4 Alert
7.5
Mode 5 – Glideslope
A “GLIDESLOPE” Caution Alert is generated if the aircraft descends
below the glideslope when the aircraft is 400’ AGL or lower while in the
Normal Sensitivity mode (200’ or lower while in the Low Sensitivity
mode) while on an ILS approach.
Figure 7-4 GPWS Mode 5 Alert
7.6
Mode 6 – Altitude Callouts
When a Radar Altimeter is installed, an altitude callout is generated any
time the aircraft descends below 300’ while in the Normal Sensitivity
mode (100’ while in the Low Sensitivity mode). Additional callouts are
configurable for 200’, 100’, 50’, 40’, 30’, 20’, and 10’.
