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 3. Fault Confirmation
__________________
 A. Test
 (1) Do a check to see if the REV indication is shown on the upper ECAM display unit with the DMC3 switched on.
 4. Fault Isolation
_______________
R A. If the REV indication is present on the upper ECAM display with the DMC3 switched on:
 (1) Replace the DMC-1 (1WT1) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
R B. If the REV indication is not present on the upper ECAM display unit with R the DMC3 switched on:
 (1) Do a check to make sure that the blocker door latches are correctly unlocked.

 (a) If there are not correctly unlocked:
 - replace the defective: LATCH-BLOCKER DOOR, UPPER R (3002KM1) or LATCH-BLOCKER DOOR, LOWER R (3002KM2) or LATCH-BLOCKER DOOR, UPPER L (3002KM3) or LATCH-BLOCKER DOOR, LOWER L (3002KM4) (Ref. AMM TASK 78-31-19-000-001) and (Ref. AMM TASK 78-31-19-400-001).

 (2) If the fault continues:

 - manually release the actuator to make sure that the blocker door or the hydraulic actuator operates correctly.
 (a) If the blocker door does not operate correctly:

 - replace the defective lower blocker door (Ref. AMM TASK 78-32-41-000-001) (Ref. AMM TASK 78-32-41-400-001) or

 - replace the defective upper blocker door (Ref. AMM TASK 78-32-41-000-002) (Ref. AMM TASK 78-32-41-400-002).

 (b) If the hydraulic actuator does not operate correctly:

 - replace the defective: ACTUATOR-BLOCKER DOOR, UPPER R (3001KM1) or ACTUATOR-BLOCKER DOOR, LOWER R (3001KM2) or ACTUATOR-BLOCKER DOOR, LOWER L (3001KM3) ACTUATOR-BLOCKER DOOR, UPPER L (3001KM4) (Ref. AMM TASK 78-31-41-000-001) (Ref. AMM TASK 78-31-41-400-001).

 (c) If the blocker door or hydraulic actuator operates correctly:

 - replace the HCU-THRUST REV (4101KS) (Ref. AMM TASK 78-31-51-000-042) and (Ref. AMM TASK 78-31-51-400-042).
 C. Do the operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-042).
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 TASK 78-00-00-810-802
 REV Indication Stays Amber on Engine 1 or 2
 1. Possible Causes
_______________
 - DMC-1 (1WT1)

 - LATCH-BLOCKER DOOR, UPPER R (3002KM1)

 - LATCH-BLOCKER DOOR, LOWER R (3002KM2)

 - LATCH-BLOCKER DOOR, LOWER L (3002KM3)

 - LATCH-BLOCKER DOOR, LOWER L (3002KM4)

 - lower blocker door

 - upper blocker door

 - ACTUATOR-BLOCKER DOOR, UPPER R (3001KM1)

 - ACTUATOR-BLOCKER DOOR, LOWER R (3001KM2)

 - ACTUATOR-BLOCKER DOOR, UPPER L (3001KM3)

 - ACTUATOR-BLOCKER DOOR, LOWER L (3001KM4)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-63-34-000-001 Removal of the DMC (1WT1,1WT2,1WT3)
 AMM 31-63-34-400-001 Installation of the DMC (1WT1,1WT2,1WT3)
 AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System
 AMM 78-31-19-000-001 Removal of the Blocker Door Latches

 (3002KM1,3002KM2,3002KM3,3002KM4) AMM 78-31-19-400-001 Installation of the Blocker Door Latches (3002KM1,3002KM2,3002KM3,3002KM4) AMM 78-31-41-000-001 Removal of the Blocker Door Hydraulic Actuator (3001KM1,3001KM2,3001KM3, 3001KM4) AMM 78-31-41-400-001 Installation of the Blocker Door Hydraulic Actuator
 (3001KM1,3001KM2,3001KM3, 3001KM4)
 AMM 78-32-41-000-001 Removal of the Lower Blocker Door
 AMM 78-32-41-000-002 Removal of the Upper Blocker Door
 AMM 78-32-41-400-001 Installation of the Lower Blocker Door
 AMM 78-32-41-400-002 Installation of the Upper Blocker Door

 3. Fault Confirmation
__________________
 A. Test
 (1) Do a check to see if the REV indication stays amber on the upper ECAM display unit with the DMC3 switched on.
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