- 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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