REV Indication for Engine 1 Thrust Reverser Flashes Amber

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1. Possible Causes
· C-duct locking actuator
· EEC ( 4000KS )
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. AMM 73-25-34-710-042 Operational Test of the EIU with the CFDS
Ref. AMM 78-31-00-710-041 Operational Test of the Thrust Reverser System with the CFDS
Ref. AMM 78-32-43-000-010 Removal of the C-Duct Locking Actuator
Ref. AMM 78-32-43-400-010 Installation of the C-Duct Locking Actuator
3. Fault Confirmation
Subtask 78-30-00-710-142-A
A. Test
(1) Do the operational test of the thrust reverser system with the CFDS (through FADEC 1A and 1B
menus) Ref. AMM 78-31-00-710-041 .
(2) Do the operational test of the EIU1 with the CFDS Ref. AMM 73-25-34-710-042 .
4. Fault Isolation
Subtask 78-30-00-810-110-A
A. If the test gives no maintenance message:
· replace the C-duct locking actuator Ref. AMM 78-32-43-000-010 and Ref. AMM 78-32-43-400-010 .
(1) If the fault continues:
· replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
(2) If the fault continues:
· do the operational test of the thrust reverser system with the CFDS (through FADEC 1A and 1B
menus) Ref. AMM 78-31-00-710-041 . [Rev.6 from Feb 2017] 2026.04.04 04:38:09 UTC