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 - on the connectors of the harnesses J5 and J6 do a resistance check between: . pins 23 and 24 (<5 ohms).
 1 If there is an open circuit:
_
 - replace or repair the harnesses J5 and J6 or the thrust reverser harness (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049).
 2 If the resistance values are in the specified limits:
_
 - do a check of the rigging of the blocker doors and correct as required (Ref. AMM TASK 78-32-41-820-001).
 a If the fault continues:
_
 - replace the ECU (4000KS), (Ref. AMM TASK 73-21-60-000-001) and (Ref. AMM TASK 73-21-60-400-001).
 D. Do an operational test of the thrust reverser (Ref. AMM TASK 78-31-00-710-042).

 (1) No additional maintenance action is required if the fault is not confirmed.

 (2) Repeat the fault isolation procedure if the fault continues.

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 TASK 78-31-00-810-864
 Failure of the Thrust Reverser Blocker Door(s) or T/R Indication Failure on the Engine 2
 1. Possible Causes
_______________
 - LATCH-BLOCKER DOOR, UPPER R (3002KM1)

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

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

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

 - SW-BLOCKER DOOR STOW, LOWER R (4104KS2)

 - SW-BLOCKER DOOR STOW, UPPER R (4104KS1)

 - SW-BLOCKER DOOR STOW, LOWER L (4104KS3)

 - SW-BLOCKER DOOR STOW, UPPER L (4104KS4)

 - HCU filter

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

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

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

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

 - HCU-THRUST REV (4101KS)

 - ECU (4000KS)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 71-51-43-000-049 Removal of the ECU (Channel A) to Thrust Reverser Junction Box Harnesses (4213KS) AMM 71-51-43-400-049 Installation of the ECU (Channel A) to Thrust
 Reverser Junction Box Harnesses (4213KS) 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 78-31-00-710-042 Operational Test of the Thrust Reverser System AMM 78-31-18-000-001 Removal of the Blocker Door Stow-switch
 (4104KS1,4104KS2,4104KS3,4104KS4) AMM 78-31-18-400-001 Installation of the Blocker Door Stow-switch (4104KS1,4104KS2,4104KS3,4104KS4) 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 78-31-51-000-042 Removal of the Hydraulic Control Unit
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 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 78-31-51-210-041 Check of the Indicator of Thrust-Reverser
 Hydraulic-Control-Unit Filter AMM 78-31-51-400-042 Installation of the Hydraulic Control Unit AMM 78-31-51-920-001 Replacement of the Hydraulic Control Unit Filter AMM 78-32-41-210-002 Detailed Visual Inspection of the Blocker Door AMM 78-32-41-820-001 Alignment of the Blocker Door AMM 78-32-41-860-001 Manual Deployment of the Blocker Door
 3. Fault Confirmation
__________________
 A. Test
 (1) Do a visual check of the thrust reverser blocker doors (Ref. AMM TASK 78-32-41-210-002):

 - make sure that they are locked (flush with the forward frame of the thrust reverser).

 (2) With the fans cowls open, grab each blocker door at the leading edge and make sure that the door cannot move from the stow position.

 NOTE : The fault is generated if at least one blocker door is
____ detected unstowed by the FADEC. If the ECAM warning ENG 2 REVERSER FAULT was also associated to the warning ENG 2 REVERSER UNLOCKED, this indicates that the FADEC auto-restow function was activated. If this was the case, pay particular attention to the rigging of the blocker doors (Ref. AMM TASK 78-32-41-820-001).
　
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