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TASK 73-20-00-810-971
Loss of the Signal of the Channel A and Channel B of the TCC Sensors on Engine
1. Possible Causes
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- TCC sensor
- harness CJ13
- harness HJ13
- ECU (4000KS)
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific bristle brush
No specific soft nose pliers
B. Consumable Materials
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REFERENCE DESIGNATION
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Material No. CP2011 *
stoddard solvent (Ref. 70-30-00)
C. Referenced Information
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REFERENCE DESIGNATION
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AMM 73-21-50-000-029 Removal of the CJ13 Harness AMM 73-21-50-000-046 Removal of the HJ13 Harness AMM 73-21-50-210-002 Visual Inspection of the Wiring Harnesses AMM 73-21-50-400-029 Installation of the CJ13 Harness AMM 73-21-50-400-046 Installation of the HJ13 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 73-21-70-000-002 Removal of the High Pressure Turbine Clearance
Control (HPTCC) Sensor AMM 73-21-70-400-002 Installation of the High Pressure Turbine Clearance Control (HPTCC) Sensor AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine non Motoring)
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3. Fault Confirmation
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A. Do the operational test of the FADEC 1 on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
4. Fault Isolation
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A. For configuration pre SB CFMI73-046
NOTE : The failure message is triggered if the TCC sensor channel A and
____ channel B input is invalid (signal out of range) and the fault lasts for more than 20 seconds.
(1) If the failure message TCC SNSR, J13, ECU on both channels is not confirmed:
(a) Do the following trouble shooting at next maintenance opportunity:
- disconnect the CJ13 connector (TCC-A & TCC-B) from both TCC sensors (3 and 9 O'Clock).
- visually examine the harness connectors and sensor receptacles for damaged pins or contamination/oxidation.
- if damage is found, repair or replace as required.
- do a cleaning of the connectors and receptacles using a bristle brush with stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
- connect the harness connectors to the sensors. Tighten the connector by hand plus one eighth of a turn. If necessary use soft nose pliers.
(2) If the failure message TCC SNSR, J13, ECU on one or both channels is not confirmed but is repetitive:
(a) Do the following trouble shooting at next maintenance opportunity:
- disconnect the CJ13 connector (TCC-A & TCC-B) from both TCC sensors (3 and 9 O'Clock).
- do a cleaning of the harness connectors using a bristle brush with stoddard solvent (Material No. CP2011) (Ref. AMM TASK 73-21-50-210-002).
- replace both TCC sensors (Ref. AMM TASK 73-21-70-000-002) and (Ref. AMM TASK 73-21-70-400-002).
NOTE : Tighten the connector by hand plus one eighth of a turn.
____ If necessary use soft nose pliers.
1 If the fault continues:
_
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