Level 1 Self-Test - Go/No Go Test; Self-Test Preamble - Honeywell MK V Line Maintenance Manual

3.3 LEVEL 1 SELF-TEST - GO/NO GO TEST

Level 1 Self-Test provides an overview of the current operational capability of the EGPWS. It is divided into 3
functions - the Preamble, Short Level 1 Self-Test, and Long Level 1 Self-Test as described in the following sections.
During Level 1 Self-Test, a Short Cancel terminates the Self-Test level and "CURRENT FAULTS" is enunciated to
indicate activation of Level 2 Self-Test. A Long Cancel terminates the entire Self-Test sequence exiting Self-Test.

3.3.1 SELF-TEST PREAMBLE

When Self-Test is initiated, the Preamble is performed. This first step in the Self-Test process checks for
configuration errors before starting the Short or Long Level 1 Self-Test process. If any are detected, the condition is
enunciated and the Self-Test process is automatically terminated (inhibited). These are listed below with the
associated probable cause and action.
Enunciation:
"PROGRAM PIN PARITY ERROR" (MK V or MK VII only)
Probable Cause: Wiring error in the program pins.
Action: Verify wiring to each program pin. Verify ODD parity selected.
Enunciation: "AIRCRAFT TYPE INVALID" (MK V or MK VII only)
Probable Cause: Wiring error to the Aircraft Type program pins.
Action: Verify wiring to the Aircraft Type program pins.
Enunciation: "CONFIGURATION TYPE INVALID" (MK VI, MK VIII, MK XXII only)
Probable Cause: The programmed configuration type is not a valid configuration.
Action: Correct and reprogram the Configuration Module (see Maintenance Practices section)
Enunciation: "AIRCRAFT CONFIGURATION DATA BASE FAILED" (MK V or MK VII only)
Probable Cause: EGPWC internal Configuration database error.
Pull power to the EGPWS for one minute and cycle power to clear all potential faults before
Action:
removing or replacing the EGPWC for repair (see Removal/Installation section)
Enunciation:
" APPLICATION DATA BASE FAILED" (MK VI, MK VIII, MK XXII only)
Probable Cause: EGPWC internal Application database error.
Pull power to the EGPWS for one minute and cycle power to clear all potential faults before
Action:
removing or replacing the EGPWC for repair (see Removal/Installation section)
Enunciation: "AIRCRAFT CONFIGURATION DATA BASE CRC FAILED" (MK V or MK VII only)
Probable Cause: EGPWC internal configuration database error.
Pull power to the EGPWS for one minute and cycle power to clear all potential faults before
Action:
removing or replacing the EGPWC for repair (see Removal/Installation section)
Enunciation: " APPLICATION DATA BASE CRC FAILED" (MK VI, MK VIII, MK XXII only)
Probable Cause: EGPWC internal Application database error.
Pull power to the EGPWS for one minute and cycle power to clear all potential faults before
Action:
removing or replacing the EGPWC for repair (see Removal/Installation section)
Enunciation: "CONFIGURATION MODULE READ ERROR" (MK VI, MK VIII, MK XXII only)
Probable Cause: The Configuration Module is faulty.
Verify Configuration Module connections. Cycle power to the EGPWC. If the problem
Action: persists, reprogram the Configuration Module. IF the condition persist, replace the
Configuration Module. See Removal/Installation section.
CAGE CODE: 97896
EGPWS LINE MAINTENANCE MANUAL
TABLE 3-1: POSSIBLE PREAMBLE RESULTS
POSSIBLE SELF-TEST PREAMBLE RESULTS
SCALE: NONE SIZE: A DWG NO.: 060-4199-180 REV: G SHEET 24 of 68