APU AUTO SHUT DOWN - NO FLAME, Ignition Unit Fault (APS 3200)

TASK 49-00-00-810-884-A
APU AUTO SHUT DOWN - NO FLAME, Ignition Unit Fault (APS 3200)

1. Possible Causes

IGNITION UNIT (8030KM)
wiring
ELECTRONIC CONTROL BOX [59KD]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
ESPM 205321A
AMM 49-00-00-710-008	Operational Test of the APU
AMM 49-41-38-000-002	Removal of the Ignition Unit (APS 3200)
AMM 49-41-38-400-002	Installation of the Ignition Unit (APS 3200)
ASM 496102
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 49-00-00-710-216-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU (4005KM) AMM 49-00-00-710-008.

4. Fault Isolation
Subtask 49-00-00-810-135-B ** ON A/C NOT FOR ALL

A. If the APU Last Leg Report gives the maintenance message:

IGNITION UNIT (8030KM):
Fault Code Number: 042
Additionally:
Fault Code Number: 023 or 091

NOTE: The APU SHUTDOWNS report gives the maintenance message:
NO FLAME - IGNITION UNIT (8030KM)
APU Auto Shut Down Fault Code Number: 042

replace the IGNITION UNIT (8030KM) AMM 49-41-38-000-002 and AMM 49-41-38-400-002.

(1) If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/F7, F6 to the IGNITION UNIT (8030KM) P10/1, 2 ASM 496102 ESPM 2052210 ESPM 205321A ESPM 2053210.

(a) If the fault continues:

replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-002 and AMM 49-61-34-400-002.

Subtask 49-00-00-710-217-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:23 UTC