TM 1-1510-225-10
3B-204
"Terrain" aural warning will sound every 0.75 seconds,
until the aircraft gains an additional 300 feet of
barometric altitude.
During an approach with the gear or flaps
extended, the 300-foot altitude gain function is
inhibited. For altitudes below 700 feet AGL with gear
and flaps extended, the "Pull Up" aural warning is
replaced by the "Terrain" aural warning.
Figure 3B-162. Excessive Sink Rate (Mode 1)
Figure 3B-163. Excessive Terrain Closure Rate (Mode 2)
