R Mod. : (4403 + 4404) or 5262
ATR 42 Model : 500
GPWS
NAVIGATION SYSTEM
P 2
NOV 01
100
1.15
.
40
ALERT MODES
MODE 1 : EXCESSIVE SINK RATE
- When the aircraft penetrates the outer envelope, the SINK RATE" voice alert is given
and the red GPWS warning lts illuminate.
Note
:
For descent rate below 1450 ft/mn, the sink rate envelope is cut off when :
- STEEP APP pb is pressed in, and,
- GLIDE/ILS 2 deviation is below 2 points or not applicable, or,
- BACK COURSE mode is selected.
- If the inner envelope is penetrated, the WHOOP WHOOP PULL UP" alert is given.This
mode does not depend on the aircraft configuration.
MODE 2 : EXCESSIVE TERRAIN CLOSURE RATE
D
FLAPS NOT IN LANDING CONFIGURATION.
When the aircraft penetrates the envelope, the TERRAIN" voice alert is given twice
and the red GPWS warning lts illuminate.
As long as the aircraft remains in the envelope, the WHOOP WHOOP PULL UP"
warning is given. When the warning conditions no longer exist, the
"TERRAIN-TERRAIN" aural message is heard until the aircraft pressure altitude has
increased by 300 ft of altitude.
AA
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