Thrust Reverser Stowed Position Set, Reverser Indication stays Green on Engine 1

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1. Possible Causes
· HCU-THRUST REV (4101KS)
· LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS )
· LVDT-THRUST REV UPPER L ACTUATOR ( 4004KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 78-31-00-710-041 Operational Test of the Thrust Reverser System with the CFDS
Ref. AMM 78-31-51-000-010 Removal of the Thrust Reverser Hydraulic Control Unit
Ref. AMM 78-31-51-400-010 Installation of the Thrust Reverser Hydraulic Control Unit
Ref. AMM 78-32-00-860-010 Manual Extension of the Thrust Reverser Translating Sleeves
Ref. AMM 78-32-00-860-011 Manual Retraction of the Thrust Reverser Translating Sleeves
Ref. AMM 78-32-48-000-010 Removal of the C-Duct Non-Locking Actuator
Ref. AMM 78-32-48-400-010 Installation of the C-Duct Non-Locking Actuator
3. Fault Confirmation
Subtask 78-30-00-710-090-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 .
4. Fault Isolation
Subtask 78-30-00-810-074-A
A. If the thrust reverser stays fully deployed:
· do a check of the thrust reverser system to make sure that the translating sleeves move freely Ref.
AMM 78-32-00-860-010 and Ref. AMM 78-32-00-860-011 .
(1) If the fault continues:
· replace the HCU-THRUST REV (4101KS) Ref. AMM 78-31-51-000-010 and Ref.
AMM 78-31-51-400-010 .
Subtask 78-30-00-810-075-A
B. If the thrust reverser moves:
· replace the LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS ) and the LVDT-THRUST REV
UPPER L ACTUATOR ( 4004KS ) Ref. AMM 78-32-48-000-010 and Ref. AMM 78-32-48-400-010 .
Subtask 78-30-00-710-091-A
C. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:38:07 UTC