Bleed Flow-Transducer Fault (APS 3200)

TASK 49-00-00-810-903-A
Bleed Flow-Transducer Fault (APS 3200)

1. Possible Causes

COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM)
wiring
wiring
INLET T-P SENSOR (8013KM)

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 49-23-17-000-001	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

3. Fault Confirmation
Subtask 49-00-00-710-254-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 49-00-00-810-154-B ** ON A/C NOT FOR ALL

A. Maintenance Action
(1) If the APU Last Leg Report gives the maintenance message:

BLD FLOW XDCR (8039KM):
Fault Code Number: 000 or 001

replace the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) AMM 49-51-19-000-002 and AMM 49-51-19-400-002.

(a) If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/A1, A4, B2, B3, A2, A3 to the COMPRESSOR DISCHARGE-PRESSURE SENSOR P24/1, 2, 3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(2) If the APU Last Leg Report gives the maintenance message:

BLD FLOW XDCR (8039KM):
Fault Code Number: 003 or 103 or 149

do a check and repair the wiring between the Delta P Sensor (P24) and the ECB (59KD) ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(a) replace the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) AMM 49-51-19-000-002 and AMM 49-51-19-400-002.
(3) If the APU Last Leg Report gives the maintenance message:

BLD FLOW XDCR (8039KM):
Fault Code Number: 170

replace the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) AMM 49-51-19-000-002 and AMM 49-51-19-400-002.

(a) If the fault continues:

do a check and repair the wiring from ECB (59KD) AB/A1, A4, B2, B3, A2, A3 to the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) P24/1, 2, 3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

1 If the fault continues:

replace the INLET T-P SENSOR (8013KM) AMM 49-23-17-000-001 and AMM 49-23-17-400-001.

a If the fault continues:

do a check and repair the wiring from ECB (59KD) AB/A1, A4, C8, C9 to the INLET T-P SENSOR P22/1, 2, 3, 4 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(4) If the APU Last Leg Report gives the maintenance message:

BLD FLOW XDCR (8039KM):
Fault Code Number: 171

replace the COMPRESSOR DISCHARGE-PRESSURE SENSOR (8039KM) AMM 49-51-19-000-002 and AMM 49-51-19-400-002.

(a) do a check and repair the wiring between the Delta P Sensor (P24) and the ECB (59KD) ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

Subtask 49-00-00-710-255-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:24 UTC