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Core Exhaust Nozzle Type Discrepancy on Engine 1
1. Possible Causes
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- J14 Identification connector
- ECU (4000KS)
2. Job Set-up Information
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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
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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
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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.
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- 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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- 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 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) agjacent 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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Core Exhaust Nozzle Type Discrepancy on Engine 2
1. Possible Causes
_______________
- J14 Identification connector
- ECU (4000KS)
2. Job Set-up Information
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