Failure of the APU GEN found by the ECB

TASK 24-23-00-810-803-A
Failure of the APU GEN found by the ECB

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 24-00-00-810-803-A	Circuit Breaker Tripped and/or C/B TRIPPED Warning
ASM 242301
AMM 49-00-00-710-001	Self-Test of the ECB
AMM 49-00-00-710-005	Self-Test of the ECB
ASM 496101

3. Fault Confirmation
Subtask 24-23-00-710-053-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the self test of the ECB:

4. Fault Isolation
Subtask 24-23-00-865-050-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
123VU	APU GEN/EGIU2/115VAC	23XS	AA08

Subtask 24-23-00-810-052-B ** ON A/C NOT FOR ALL

B. If the test gives the CLASS 3 maintenance message GENERATOR 8XS or the CLASS 2 maintenance message ECB (59KD):

(1) If the circuit breaker is open:

(a) If the fault continues:

(2) If the circuit breaker is closed:

Do a check and repair the wiring between:
. the circuit breaker APU GEN/EGIU2/115VAC (23XS) and the pin AC/8 of the ECB (59KD) ASM 496101.
. the circuit breaker APU GEN/EGIU2/115VAC (23XS) and the pin A/D of the APU GLC (3XS) ASM 242301.

Subtask 24-23-00-810-052-C ** ON A/C NOT FOR ALL

B. If the test gives the CLASS 3 maintenance message GENERATOR 8XS or the CLASS 2 maintenance message ECB (59KD):

(1) If the circuit breaker is open:

(a) If the fault continues:

(2) If the circuit breaker is closed:

Do a check and repair the wiring between:
. the circuit breaker APU GEN/EGIU2/115VAC (23XS) and the pin AC/8 of the ECB (59KD) ASM 496101
. the circuit breaker APU GEN/EGIU2/115VAC (23XS) and the pin 9 of the APU/EXT power contactor module (29XN) ASM 242301.

Subtask 24-23-00-710-054-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:26:39 UTC