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 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 73-21-60-740-005 Entry of the Core Chevron Nozzle Status Through MCDU AMM 73-21-90-000-002 Removal of the Engine Identification Connector AMM 73-21-90-400-002 Installation of the Engine Identification Connector AMM 73-21-90-860-001 Programming of the Identification Plug (Push-Pull
 Design) AMM 73-29-00-710-040 Operational Test of the FADEC on the Ground (with Engine Non motoring)
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC on the ground (with engine non motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message J14WRONG, ECU ENTRY:
 - Visually verify the nozzle configuration:
 NOTE : There are two configuration of core exhaust nozzle.
____

 - Standard nozzle configuration is identified by a smooth conical exit surface

 - Core chevron nozzle configuration is identified by 8 chevrons (triangular) around the circumference of the exit surface (SB RA32078-118).

 (1) If a standard nozzle configuration is physically installed:
 - On the left or right MCDU, get access to the ENGINE MAIN MENU screen.

 - Push the line key (3L) adjacent to the LRU IDENT REPORT :

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E E 56 E E E (a) If the MCDU screen indicates CCNECU N and CCNIDP Y:

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 - Replace the J14 Identification connector (Ref. AMM TASK 73-21-90-000-002) and (Ref. AMM TASK 73-21-90-400-002) or Do Re-programming of the Identification Connector (Push-pull design only) to a standard nozzle configuration (Ref. AMM TASK 73-21-90-860-001).
 (b) If the MCDU screen indicates CCNECU Y and CCNIDP N:

 - Do a configuration change of the Core Chevron Nozzle status change on LRU IDENT REPORT (Ref. AMM TASK 73-21-60-740-005).

 (c) If the MCDU screen indicates CCNECU N and CCNIDP N:

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 (2) If a core chevron nozzle configuration is physically installed:
 - On the left or right MCDU, get access to the ENGINE MAIN MENU screen.

 - Push the line key (3L) adjacent to the LRU IDENT REPORT:

 (a) If the MCDU screen indicates CCNECU Y and CCNIDP N:

 - Replace the J14 Identification connector (Ref. AMM TASK 73-21-90-000-002) and (Ref. AMM TASK 73-21-90-400-002) or Do Re-programming of the Identification Connector (Push-pull design only) to a core chevron nozzle configuration (Ref. AMM TASK 73-21-90-860-001).

 (b) If the MCDU screen indicates CCNECU N and CCNIDP Y:

 - Do a configuration change of the Core Chevron Nozzle status on LRU IDENT REPORT (Ref. AMM TASK 73-21-60-740-005).

 (c) If the MCDU screen indicates CCNECU Y and CCNIDP Y:

 - replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 B. Do the test given in Para. 3.A.
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E TASK 73-20-00-810-979 Loss of Thrust Control Malfunction Accomodation Protection

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 1. Possible Causes
_______________
 - ECU (4000KS)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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 Motoring)

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the FADEC on the ground (with engine motoring) (Ref. AMM TASK 73-29-00-710-040).
 4. Fault Isolation
_______________
　
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