Honeywell MK V LEVEL 1 SELF-TEST- GO/NO GO TEST, Self-Testpreamble, Egpws Line Maintenance Manual

EGPWS 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.

TABLE 3-1: POSSIBLE PREAMBLE RESULTS

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POSSIBLE SELF-TEST PREAMBLE RESULTS “PROGRAM PIN PARITY ERROR” (MK V or MK VII only)

Wiring error in the program pins.

Verify wiring to each program pin. Verify ODD parity selected.

“AIRCRAFT TYPE INVALID” (MK V or MK VII only)

Wiring error to the Aircraft Type program pins.

Verify wiring to the Aircraft Type program pins.

“CONFIGURATION TYPE INVALID” (MK VI, MK VIII, MK XXII only)

The programmed configuration type is not a valid configuration.

Correct and reprogram the Configuration Module (see Maintenance Practices section)

“AIRCRAFT CONFIGURATION DATA BASE FAILED” (MK V or MK VII only)

EGPWC internal Configuration database error.

Pull power to the EGPWS for one minute and cycle power to clear all potential faults before removing or replacing the EGPWC for repair (see Removal/Installation section)

“APPLICATION DATA BASE FAILED” (MK VI, MK VIII, MK XXII only) EGPWC internal Application database error.

Pull power to the EGPWS for one minute and cycle power to clear all potential faults before removing or replacing the EGPWC for repair (see Removal/Installation section)

“AIRCRAFT CONFIGURATION DATA BASE CRC FAILED” (MK V or MK VII only)

EGPWC internal configuration database error.

Pull power to the EGPWS for one minute and cycle power to clear all potential faults before removing or replacing the EGPWC for repair (see Removal/Installation section)

“APPLICATION DATA BASE CRC FAILED” (MK VI, MK VIII, MK XXII only) EGPWC internal Application database error.

Pull power to the EGPWS for one minute and cycle power to clear all potential faults before removing or replacing the EGPWC for repair (see Removal/Installation section)

“CONFIGURATION MODULE READ ERROR” (MK VI, MK VIII, MK XXII only)

The Configuration Module is faulty.

Verify Configuration Module connections. Cycle power to the EGPWC. If the problem persists, reprogram the Configuration Module. IF the condition persist, replace the Configuration Module. See Removal/Installation section.

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