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REFERENCE DESIGNATION
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AMM 75-22-10-000-002 Removal of the Low Pressure Turbine Active Clearance Control (LPTACC) Valve AMM 75-22-10-400-001 Installation of the Low Pressure Turbine Active Clearance Control Valve (LPTACC). 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. Test
(1) Do the operational test of the FADEC 2A and 2B on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
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R **ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
A. The failure messages are generated if the channels A and B signals are invalid, out of range, or both channels disagree.
(1) If the failure messages LPTC VLV, J11, ECU and LPTC VLV, J12, ECU are not confirmed:
(a) No maintenance action is required.
(2) If the failure messages LPTC VLV, J11, ECU and LPTC VLV, J12, ECU are not confirmed but are repetitive:
- disconnect the CJ11R and CJ12R harnesses from the LPTC valve (LPT-A and LPT-B connectors) and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-001).
(a) If damage is found:
- repair or replace as required.
(b) If no damage is found:
- replace the LPTC valve (Ref. AMM TASK 75-22-10-000-001) and (Ref. AMM TASK 75-22-10-400-001).
(c) If the fault continues during the subsequent flights:
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
(d) If the fault continues during the subsequent flights:
- replace the harness J11 (Ref. AMM TASK 73-21-50-000-010) and (Ref. AMM TASK 73-21-50-400-010).
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(e) If the fault continues during the subsequent flights:
- replace the harness CJ11R (located in the right core compartment) (Ref. AMM TASK 73-21-50-000-002) (Ref. AMM TASK 73-21-50-400-002).
(f) If the fault continues during the subsequent flights:
- replace the harness J12 (Ref. AMM TASK 73-21-50-000-011) and (Ref. AMM TASK 73-21-50-400-011).
(g) If the fault continues during the subsequent flights:
- replace the harness CJ12R (located in the right core compartment) (Ref. AMM TASK 73-21-50-000-004) (Ref. AMM TASK 73-21-50-400-004).
(3) If the failure message LPTC VLV, J11, ECU is confirmed on channel A:
- disconnect the CJ11R harness (LPT-A) connector (located in the right core compartment) from the LPTC valve and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-001).
(a) If damage is found:
- repair or replace as required.
(b) If no damage is found:
- do the electrical resistance test through the LPTC valve between: . pins 2 and 3 (80 to 109.5 ohms) . pins 4 and 5 (85 to 115 ohms) . pins 6 and 7 (85 to 115 ohms) . pin 2 and the ground (> 10 megohms) . pin 4 and the ground (> 10 megohms) . pin 6 and the ground (> 10 megohms).
(c) If the resistance values are out of the specified limits:
- replace the LPTC valve (Ref. AMM TASK 75-22-10-000-001) and (Ref. AMM TASK 75-22-10-400-001).
(d) If the resistance values are in the specified limits:
- connect the CJ11R harness (LPT-A) connector to the LPTC valve receptacle (located in the right core compartment),
- disconnect the J11 harness from the ECU (4000KS) and visually examine the receptacles and the connectors for damaged pins or contamination (Ref. AMM TASK 73-21-50-210-001).
1 If damage is found:
_ - repair or replace as required.
2 If no damage is found:
_
- do an electrical resistance test through the J11 harness between: . pins 4 and 5 (80 to 109.5 ohms) . pins 6 and 7 (85 to 115 ohms)
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