10V Pressure-Reference Fault (APS 3200)

TASK 49-00-00-810-906-A
10V Pressure-Reference Fault (APS 3200)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ESPM 2052210
ESPM 2053210
ESPM 205321A
AMM 49-00-00-710-005	Self-Test of the ECB
AMM 49-23-17-000-001	Removal of the Inlet Pressure/Temperature Sensor (APS 3200)
AMM 49-23-17-400-001	Installation of the Inlet Pressure/Temperature Sensor (APS 3200)
AMM 49-51-19-000-002	Removal of the Sensor - Compressor Discharge Pressure (APS 3200)
AMM 49-51-19-400-002	Installation of the Sensor - Compressor Discharge Pressure (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 49-00-00-710-260-A ** ON A/C NOT FOR ALL

A. Do the self test of the ECB AMM 49-00-00-710-005.

4. Fault Isolation
Subtask 49-00-00-810-157-B ** ON A/C NOT FOR ALL

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

ECB (59KD) / APU HARNESS (8001KM):
Fault Code Number: 123

(1) If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/A1, A4 to the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) P24/1, 2, ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(a) If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/A1, A4 to the INLET PRESSURE/TEMPERATURE SENSOR (8013KM) P22/1, 2 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

1 If the fault continues:

replace the INLET PRESSURE/TEMPERATURE SENSOR (8013KM) AMM 49-23-17-000-001 and AMM 49-23-17-400-001.

a If the fault continues:

replace the COMPRESSOR DISCHARGE-PRESSURE SENSOR AMM 49-51-19-000-002 and AMM 49-51-19-400-002.

Subtask 49-00-00-710-261-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:25 UTC