060-4314-000 • Rev. C - May 2004
MK VI & MK VIII EGPWS Pilot Guide
49
EGPWS
Self-Test
The EGPWS provides a Self-Test capability for verifying and indi-
cating intended functions. This Self-Test capability consists of six
levels to aid in testing and troubleshooting the EGPWS. These six
levels are:
Level 1 -
Go / No Go Test provides an overview of the current
operational functions and an indication of their status.
Level 2 - Current Faults
provides a list of the internal and ex-
ternal faults currently detected by the EGPWS.
Level 3 - EGPWS Configuration indicates the current con
-
figuration by listing the EGPWS hardware, software,
databases, and installation configuration detected by
the EGPWS.
Level 4 - Fault History
provides an historical record of the in-
ternal and external faults detected by the EGPWS.
Level 5 - Warning History
provides an historical record of the
alerts given by the EGPWS.
Level 6 - Discrete Test
provides audible indication of any
change to a discrete input state.
A Level 1 Self Test (Go/No Go) is normally performed by flight
crews as part of preflight checks. All levels are typically used for
installation checkout and maintenance operations.
A Level 1 Test is used to verify proper operation of the EGPWS on
the ground as follows:
1. Ensure that adequate aircraft power is available and the EG
-
PWS 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 extin
-
guished. 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 displayed.
5. Momentarily depress the EGPWS Self-Test switch.
When a Self-Test is initiated, the EGPWS first checks for any con-
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