Honeywell MK VI Pilot's Manual page 19

M 4
ODE B
Continued
M 4
ODE C
060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide
Unsafe terrain clearance gear down turbprop
Unsafe terrain clearance gear down turbofan (jet)
If the aircraft radio altitude decreases to the value of the
Minimum Terrain Clearance (MTC), the EGPWS caution light
illuminates and the aural message "TOO LOW TERRAIN" is
enunciated.
If desired, the pilot may disable the "TOO LOW FLAPS" alert by
engaging the Flap Override switch (if installed). This precludes
or silences the Mode 4B flap alert until reset by the pilot.
For any Mode 4B alert, subsequent aural messages occur only if
penetration of the envelope increases by 20%. EGPWS alert lights
extinguish and aural messages cease when the Mode 4B alert
envelope is exited.
The Mode 4C alert is intended to prevent inadvertent controlled
flight into the ground during takeoff climb into terrain that pro-
duces insufficient closure rate for a Mode 2 alert. After takeoff,
Mode 4A and 4B provide this protection.
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