System Activation - Honeywell EGPWS MK V Pilot's Manual

System
Constraints
continued
System
Activation
48
• The EGPWS terrain/obstacle database includes
cataloged human-made obstructions 100 feet high or
greater within North America and portions of the Caribbean
(expanding). The database is not all-inclusive and newer,
smaller, or unknown obstructions could be encountered.
Refer to an appropriate AFM or EGPWS AFMS for specific
system limitations and procedures.
The EGPWS is fully active when the following systems are
powered and functioning normally:
• EGPWS
• Radio Altimeter
• Air Data
• ILS or Glideslope Receiver
• IRS, AHRS, VG (attitude)
• GPS, FMS, or IRS (position)
• Landing gear
• Landing flaps
• Stall warning or AOA (windshear only)
• Weather Radar, EFIS, or a dedicated terrain display
(if terrain/obstacle display enabled)
In the event that required data for a particular function is not
available, then that function is automatically inhibited and
annunciated (e.g. if position data is not available or determined
unacceptable, TAD and TCF is inhibited, any active terrain
display is removed, and "TERR INOP", "TERR UNAVAIL" (or
equivalent) is indicated).
Some installations utilize redundant systems so that if the
primary source of data fails, the EGPWS continues on the
secondary source.
060-4241-000 • Rev. D - March 2000
MK V & MK VII EGPWS Pilot Guide