Mark V and Mark VII EGPWS Pilot's Guide
Monitor functions which provide Caution annunciations can
be configured to activate the existing GPWS inoperative
indicator if the function is inoperative.
Refer to an appropriate AFM or EGPWS AFMS for specific
system and status requirements.
The EGPWS provides a Self-Test capability for verifying and
indicating intended functions. This Self-Test capability
consists of six levels to aid in testing and troubleshooting the
These six levels are:
Level 1 – Go/No Go Test provides an overview of the current
Level 2 – Current Faults provides a list of the internal and
Level 3 – EGPWS Configuration indicates the current
Level 4 – Fault History provides an historical record of the
Level 5 – Warning History provides an historical record of
Level 6 – Discrete Test provides audible indication of any
A level 1 Go/No Go Test is normally performed by flight
crews as part of preflight checks. All other levels are typically
used for installation checkout and maintenance operations.
Level 1 Self-Test is used to verify proper operation of the
EGPWS on the ground as follows:
Rev H, August 2011
operational functions and an indication of their
external faults currently detected by the EGPWC.
configuration by listing the EGPWS hardware,
software, databases, and program pin inputs
detected by the EGPWC.
internal and external faults detected by the
the alerts given by the EGPWS.
change to a discrete input state.
1. Ensure that adequate aircraft power is available and the
EGPWS and associated systems are powered.
2. Ensure that any EGPWS inhibiting switches are in the
normal (non-inhibiting) position.
3. Verify that EGPWS inoperative annunciations are
extinguished. If an inoperative annunciation is indicated,
perform the EGPWS Self-Test (below) and then seek
corrective action if the inoperative condition persists.
4. If a terrain display is enabled, select terrain to be
5. Momentarily depress the EGPWS Self-Test switch.