Loss of Data on the ARINC Bus from FADEC 2 Channel A

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1. Possible Causes
· wiring from the EEC 2 (4000KS) to the EIU 2 (1KS2)
· EEC ( 4000KS )
· EIU-2 ( 1KS2 )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. ASM 73-25-06
Ref. AMM 73-25-34-000-041 Removal of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-400-041 Installation of the Engine Interface Unit (EIU)
Ref. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
3. Fault Confirmation
Subtask 73-22-00-710-056-A
A. Test
(1) Do the operational test of the EIU 2 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 73-22-00-810-053-A
A. If the operational test gives the maintenance message EIU 2 : NO FADEC 2A DATA:
· do a check of the wiring from the EEC 2 (4000KS) to the EIU 2 (1KS2) pins J1/P, D to pins AA/15A,
15C Ref. ASM 73-25-06.
(1) If there is no continuity:
· repair the above wiring.
(2) If there is continuity:
· replace the EEC ( 4000KS ) , Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(a) If the fault continues:
· replace the EIU-2 ( 1KS2 ) , Ref. AMM 73-25-34-000-041 and Ref. AMM 73-25-34-400-041 .
Subtask 73-22-00-710-057-A
B. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:36:15 UTC