- retighten, clean or repair as required (Ref. AMM TASK 78-31-42-210-041).
(b) If nothing is found:
- do a check of the harness routing and look for chafing or cut in the harness envelope.
1 If damage is found:
_
- replace the defective thrust reverser harness or harness J5 or harness J6 (Ref. AMM TASK 71-51-43-000-044) and (Ref. AMM TASK 71-51-43-400-044) (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049) (Ref. AMM TASK 71-51-43-000-004) and (Ref. AMM TASK 71-51-43-400-004).
2 If nothing is found and the fault continues while the fault
_ message is never confirmed during the thrust reverser test:
- Inspect the deploy switches levers (Ref. AMM TASK 78-31-17-210-040).
- If the finding do not indicate mechanical problem, replace the defective: . SW-BLOCKER DOOR DEPLOY, L (4103KS1) or/and . SW-BLOCKER DOOR DEPLOY, R (4103KS2) (Ref. AMM TASK 78-31-17-000-040) and (Ref. AMM TASK 78-31-17-400-040).
a If the fault continues:
_
- replace successively the harness J5 then the harness J6 then the thrust reverser harness (Ref. AMM TASK 71-51-43-000-049) and (Ref. AMM TASK 71-51-43-400-049) (Ref. AMM TASK 71-51-43-000-004) and (Ref. AMM TASK 71-51-43-400-004) (Ref. AMM TASK 71-51-43-000-044) and (Ref. AMM TASK 71-51-43-400-044).
b 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).
B. Do the test given in Para. 3.A.
(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 78-31-00-810-845
Loss of the Signal of the Thrust-Reverser Blocker-Door Deploy/Stow Switches on Engine 1
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
78-31-00-810-839 Thrust-Reverser Blocker-Door Stow-Switches Feedback Disagree on Engine 1 78-31-00-810-843 Thrust-Reverser Blocker-Door Deploy-Switches Feedback Disagree on Engine 1 AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System
3. Fault Confirmation
__________________
A. Do the operational test of the thrust reverser system (1A and 1B) (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
_______________
A. If the test gives the maintenance message DPLSTW SW J5/J6, ECU through the channel A or B:
NOTE : A fault has been detected which cannot be isolated to the
____ thrust-reverser blocker-door deploy and/or stow-switch circuits
- do the procedures as given with the CFDS messages below:
. DEPL SW, J5/J6, ECU (Ref. TASK 78-31-00-810-843) and
. STOW SW, J5/J6, ECU (Ref. TASK 78-31-00-810-839).
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Loss of the Signal of the Thrust-Reverser Blocker-Door Deploy/Stow Switches on Engine 2
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
78-31-00-810-840 Thrust-Reverser Blocker-Door Stow-Switches Feedback Disagree on Engine 2 78-31-00-810-844 Thrust-Reverser Blocker-Door Deploy-Switches Feedback Disagree on Engine 2 AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System
3. Fault Confirmation
__________________
A. Do the operational test of the thrust reverser system (2A and 2B) (Ref. AMM TASK 78-31-00-710-042).
4. Fault Isolation
_______________
A. If the test gives the maintenance message DPLSTW SW J5/J6, ECU through the channel A or B:
NOTE : A fault has been detected which cannot be isolated to the
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