- Replace the 3 Fuel nozzles position 3,5 and 7 (Ref. AMM TASK 73-11-40-000-002) and (Ref. AMM TASK 73-11-40-400-002).
NOTE : Fuel nozzles position 3,5 and 7 are the most exposed to
____ contamination in case of fuel manifold coking.
(10) If the fault does not continue during subsequent flights:
NOTE : If the EGT exceedence is determined to be caused by fuel
____ manifold coking, then replacement of all other fuel nozzles as well as replacement of the fuel manifolds is required.
- replace all Fuel nozzles except position 3,5 and 7 (replaced in previous step) (Ref. AMM TASK 73-11-40-000-002) and (Ref. AMM TASK 73-11-40-400-002).
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B. Test.
(1) No test required.
(2) If the fault continues:
- Repeat the fault isolation procedure.
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TASK 77-00-00-810-858
N1/N2 Mismatch on the Same Engine, on Engine 1 or 2
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 71-00-00-710-006 Minimum Idle Check
AMM 73-29-00-710-040 Operational Test of the FADEC on the ground (with
Engine Motoring) AMM 75-31-00-210-002 Visual Inspection of the Variable Bleed Valve System TSM 73-20-00-810-919 Loss of the ADIRU input Data through the Channel A or
disagree between Aircraft and Engine sensors on Engine 1
TSM 73-20-00-810-920 Loss of the ADIRU input Data through the Channel A or disagree between Aircraft and Engine sensors on Engine 2
TSM 73-20-00-810-961 Loss of the ADIRU input Data through the Channel B or disagree between Aircraft and Engine sensors on Engine 1
TSM 73-20-00-810-962 Loss of the ADIRU input Data through the Channel B or disagree between Aircraft and Engine sensors on Engine 2
3. Fault Confirmation
__________________
A. Test
(1) Not applicable, the fault is evident.
4. Fault Isolation
_______________
R **ON A/C 001-049, 056-056, 058-058, 061-099, 101-105, 151-199, 201-211,
A. If the fault symptom is identified by the crew observation: ENG1-N1/N2 mismatch on the same engine:
(1) Do an operational test of the FADEC on the ground (with engine motoring) to do a check of the VSV/VBV position (Ref. AMM TASK 73-29-00-710-040).
(2) Do a visual inspection of the variable bleed valve system to do a check of the VBV doors position (Ref. AMM TASK 75-31-00-210-002).
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ER **ON A/C 051-055, 057-057, 059-060, 106-149, 212-299, 301-399, 401-499,
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A. If the fault symptom is identified by the crew observation: ENG1-N1/N2 mismatch on the same engine:
(1) Do a check of the Post Flight Report (PFR) and the Scheduled Maintenance report (SRM)/class 3 for P0/P12/T12, ADC, ECU:
(a) If the failure message is present, do the related troubleshoot procedure (Ref. TSM TASK 73-20-00-810-919) or (Ref. TSM TASK 73-20-00-810-920) or (Ref. TSM TASK 73-20-00-810-961) or (Ref. TSM TASK 73-20-00-810-962).
(b) If the failure message is not present:
1 Do an operational test of the FADEC on the ground (with engine
_ motoring) to do a check of the VSV/VBV position (Ref. AMM TASK 73-29-00-710-040).
2 Do a visual inspection of the variable bleed valve system to
_ do a check of the VBV doors position (Ref. AMM TASK 75-31-00-210-002).
**ON A/C ALL
B. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006).
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