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- Do a general visual inspection of the TR hydraulic tubes (Ref. AMM TASK 78-31-49-210-002)
(1) If damage is found:
- repair or replace as necessary.
(2) If mothing is found:
- Perform a manual deployment of the blocker door (Ref. AMM TASK 78-32-41-860-001)
- Do a general visual inspection of the blocker door latches, hinges and adjacent structure (Ref. AMM TASK 78-31-19-210-041).
(a) If damage is found:
- repair or replace as necessary.
(b) If nothing is found:
- Do a general visual inspection of blocker door actuator rod end attachments (Ref. AMM TASK 78-31-41-210-042)
1 If damaged is found:
_ - repair or replace as necessary.
2 if nothing is found:
_
- Do a detailed visual inspection of the electrical harness (Ref. AMM TASK 78-31-42-210-041)
a If damage is found:
_ - repair or replace as necessary.
b if nothing is found:
_
- replace the ECU (4000KS) (Ref. AMM TASK 73-21-60-000-001) (Ref. AMM TASK 73-21-60-400-001)
* If the fault continues, replace the HCU (4101KS) (Ref. AMM TASK 78-31-51-000-042) (Ref. AMM TASK 78-31-51-400-042).
B. Do the test given in Para. 3.A.
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TASK 78-31-00-810-876
Thrust Reverser remaining fully stowed when commanded to deploy on ENG2
1. Possible Causes
_______________
- TR hydraulic tubes
- blocker door latches
- blocker door actuator
- electrical harness
- ECU (4000KS)
- HCU (4101KS)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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 78-31-19-210-041 General Visual Inspection of the Blocker Door
latches, Hinges and Adjacent Structure (Blocker Doors Deployed) AMM 78-31-41-210-042 General Visual Inspection of Actuator Rod End
Attachments (Blocker Doors Deployed) AMM 78-31-42-210-041 Detailed Visual Inspection of the electrical Harness AMM 78-31-49-210-002 General Visual Inspection of the Hydraulic Tubing and
Hoses (Blocker Doors Deployed)
AMM 78-31-51-000-042 Removal of the Hydraulic Control Unit
AMM 78-31-51-400-042 Installation of the Hydraulic Control Unit
AMM 78-32-41-860-001 Manual Deployment of the Blocker Door
3. Fault Confirmation
__________________
A. Test
(1) Do an operational test of the Thrust Reverser system (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
_______________
A. If the test gives the maintenance message EIU, HCU:
NOTE : If the Thrust Reverser remains fully stowed when commanded to
____ deploy, the ECU triggers the "EIU, HCU" maintenance message instead of "TR LOCK, TR ACT" (due to 2 fault inverted into the ECU software) carry out the following TSM procedure without take into account the components highlighted into the maintenance message.
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- Do a general visual inspection of the TR hydraulic tubes (Ref. AMM TASK 78-31-49-210-002)
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