APU Available Indication Fault (APS 3200)

TASK 49-61-00-810-809-A
APU Available Indication Fault (APS 3200)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
AMM 33-14-00-710-001	Operational Test of the Lights
AMM 33-14-33-000-001	Removal of the Annunciator-Light Test and Interface-Board
AMM 33-14-33-400-001	Installation of the Annunciator-Light Test and Interface-Board
AMM 49-00-00-710-008	Operational Test of the APU
ASM 494201
AMM 49-61-34-000-002	Removal of the Electronic Control Box (ECB) (APS 3200)
AMM 49-61-34-400-002	Installation of the Electronic Control Box (ECB) (APS 3200)

3. Fault Confirmation
Subtask 49-61-00-710-064-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU AMM 49-00-00-710-008.

4. Fault Isolation
Subtask 49-61-00-810-057-A ** ON A/C NOT FOR ALL

A. If the APU Class 3 Faults Page gives the maintenance message:

WRG: ECB PIN AB-J6
Fault Code Number: 020 or 088

do the Operational Test of the Annunciator Light Test System in the Cockpit AMM 33-14-00-710-001.

(1) If the fault continues:

(2) If the Annunciator Light Test is OK:

check and repair the aircraft wiring between ECB (59KD) AB-J6 and RELAY BOARD (7LP) A/21 (in case of FCN 020 for a short ciruit) and between A45 and GND ASM 494201 ESPM 2052210 ESPM 2053210.

(a) If the fault continues:

check and repair the aircraft wiring between Relay APU Avail (6KD) A/X1 and the next terminal block and between A/X2 and GND ASM 494201 ESPM 2052210 ESPM 2053210.

1 If the fault continues:

a If the fault continues:

Subtask 49-61-00-710-065-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:40 UTC