Bleed Control Valve Fault (APS 3200)

TASK 49-00-00-810-942-A
Bleed Control Valve Fault (APS 3200)

1. Possible Causes

fuel leaks
wiring
BLEED CONTROL VALVE (8051KM)
ELECTRONIC CONTROL BOX [59KD]
FUEL CONTROL UNIT (8022KM)
FUEL FLOW DIVIDER (8024KM)

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 49-32-11-000-002	Removal of the Fuel Control Unit (APS 3200)
AMM 49-32-11-400-002	Installation of the Fuel Control Unit (APS 3200)
AMM 49-32-12-000-002	Removal of the Flow Divider (APS 3200)
AMM 49-32-12-400-002	Installation of the Flow Divider (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)
AMM 49-51-53-000-001	Removal of the Bleed Control Valve (APS 3200)
AMM 49-51-53-400-001	Installation of the Bleed Control Valve (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)
AMM 49-73-00-00-

3. Fault Confirmation
Subtask 49-00-00-710-311-A ** ON A/C NOT FOR ALL

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

NOTE: During the operational test of the APU, carefully examine the fuel lines from the fuel control unit to the bleed control valve:

fuel leaks are not permitted, correct/replace as necessary.

4. Fault Isolation
Subtask 49-00-00-810-297-B ** ON A/C NOT FOR ALL

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

BLEED CTL VLV (8051KM):
Fault Code Number(s): 69 or 70

do a check and repair the wiring from the ECB (59KD) AB/G6, G7 to the BLEED CONTROL VALVE (8051KM) P33/1, 2 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(a) If the fault continues:

replace the BLEED CONTROL VALVE (8051KM) AMM 49-51-53-000-001 and AMM 49-51-53-400-001.

1 If the fault continues:

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

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

BLEED CTL VLV (8051KM):
Fault Code Number: 96

do a check of the IGV Actuator Guide pin with the IGV for correct installation. If the pin is disengaged, replace the pin.

(a) If the fault continues:

replace the BLEED CONTROL VALVE (8051KM) AMM 49-51-53-000-001 and AMM 49-51-53-400-001.

1 If the fault continues:

do a check and repair the wiring from the ECB (59KD) AB/G6, G7, H3, F10, D7, J5 to the BLEED CONTROL VALVE (8051KM) P33/1, 2, 3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

(b) If the fault continues:
Interrogate CFDS for APU fault message. Use prompts (>) to go to the fault conditions screen AMM 49-73-00-00-.

Print Fault Condition Screen and do an inspection of the APU Inlet Pressure (P2A) and Bleed Air Pressure (PT).
1 If an unusual P2A value is shown, compare with Ambient Static Pressure.

NOTE: At Standard Sea Level, P2A is 1013 mbar (14.69 psi).

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

If the fault continues:
. do a check of the wiring from the ECB (59KD) AB/A1. A4, C8, C9, D3, E6 to the INLET PRESSURE/TEMPERATURE SENSOR (8013KM) p22/1, 2, 3, 4, 6, 5 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

2 If an unusual PT value is shown.

NOTE: The possible values of PT must be around 1.2 bar (17.4045 psi).

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

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

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

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

BLEED CTL VLV (8051KM):
Fault Code Number:138

replace the BLEED CONTROL VALVE (8051KM) AMM 49-51-53-000-001 and AMM 49-51-53-400-001.

(a) If the fault continues:

do a check and repair the wiring between the ECB (59KD) AB/H3, F10, D7, J5 and the BLEED CONTROL VALVE LVDT P33/3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

1 If the fault continues:

replace the FUEL CONTROL UNIT (8022KM) AMM 49-32-11-000-002 and AMM 49-32-11-400-002.

a If the fault continues:

replace the FUEL FLOW DIVIDER (8024KM) AMM 49-32-12-000-002 and AMM 49-32-12-400-002.

b If the fault continues:

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

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

BLEED CTL VLV (8051KM):
Fault Code Number: 119 or 172

replace the BLEED CONTROL VALVE (8051KM) AMM 49-51-53-000-001 and AMM 49-51-53-400-001.

(a) If the fault continues:

do a check and repair the wiring between the ECB (59KD) AB/H3, F10, D7, J5 and the BLEED CONTROL VALVE LVDT P33/3, 4, 5, 6 ASM 496102 ESPM 2052210 ESPM 2053210 ESPM 205321A.

1 If the fault continues:

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

Subtask 49-00-00-710-312-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:27 UTC