- harness HJ12
- harness CJ12R
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 73-21-50-000-028 Removal of the CJ12R Harness AMM 73-21-50-000-045 Removal of the HJ12 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-028 Installation of the CJ12R Harness AMM 73-21-50-400-045 Installation of the HJ12 Harness AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with
Engine non Motoring) AMM 75-22-10-000-002 Removal of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve AMM 75-22-10-400-002 Installation of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve
3. Fault Confirmation
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A. Do the operational test of the FADEC 2B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
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R A. The fault message is generated if the channel B signal is invalid, out of R range.
R (1) If the failure message LPTC VLV, J12, ECU is not confirmed:
R (a) No maintenance action is required.
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R (2) If the failure message LPTC VLV, J12, ECU is not confirmed but is
R repetitive:
R - disconnect the CJ12R harness (LPT-B) connector (located in the
R right core compartment) from the LPTC valve and visually examine
R the receptacles and the connectors for damaged pins or
R contamination (Ref. AMM TASK 73-21-50-210-002).
R (a) If damage is found:
R - repair or replace as required.
R (b) If no damage is found:
R - replace the LPTC valve (Ref. AMM TASK 75-22-10-000-002) and
R (Ref. AMM TASK 75-22-10-400-002).
R (c) If the fault continues during the subsequent flights:
R - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and
R (Ref. AMM TASK 73-21-60-400-001).
R (d) If the fault continues during the subsequent flights:
R - replace the harness HJ12 (ECU to the 6 o'clock junction box)
R (Ref. AMM TASK 73-21-50-000-045) and (Ref. AMM TASK 73-21-50-
400-045).
R (e) If the fault continues during the subsequent flights: R - replace the harness CJ12R (located in the right core R compartment) (Ref. AMM TASK 73-21-50-000-028) and (Ref. AMM
TASK 73-21-50-400-028).
R (3) If the failure message LPTC VLV, J12, ECU is confirmed: R - disconnect the CJ12R harness (LPT-B) connector (located in the R right core compartment) from the LPTC valve and visually examine R the CJ12R wire harness connector receptacles and the LPTC valve R connectors for damaged pins or contamination (Ref. AMM TASK 73-21-
50-210-002).
R (a) If damage is found:
R - repair or replace as required.
R (b) If no damage is found:
R - do an electrical resistance test through the LPTC valve
R between:
R . pins 2 and 3 (80 to 109.5 ohms)
R . pins 4 and 5 (85 to 115 ohms)
R . pins 6 and 7 (85 to 115 ohms)
R . pin 2 and the ground (> 10 megohms)
R . pin 4 and the ground (> 10 megohms)
R . pin 6 and the ground (> 10 megohms).
R (c) If the resistance values are out of the specified limits:
R - replace the LPTC valve (Ref. AMM TASK 75-22-10-000-002) and
R (Ref. AMM TASK 75-22-10-400-002).
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R (d) If the resistance values are in the specified limits:
R - reconnect the CJ12R harness (LPT-B) connector to the LPTC
R valve,
R - disconnect the HJ12 harness (channel B) from the ECU (4000KS)
R and visually examine the receptacle for damaged pins or
R contamination (Ref. AMM TASK 73-21-50-210-002).
R 1_ If damage is found:
R - repair or replace as required.
R 2_ If no damage is found:
R - do an electrical resistance test through the HJ12 harness
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本文链接地址：A320 Trouble Shooting Manual 排故手册 大气 AIR(23)
