W DOC AIRBUS | TSM A320F

Partial deployment of the Thrust Reverser when commanded to deploy on ENG1

TASK 78-31-00-810-871-A
Partial deployment of the Thrust Reverser when commanded to deploy on ENG1

1. Possible Causes
  • TR hydraulic tubes
  • blocker door actuator
  • stow-switches
  • electrical harness
  • EIU
  • HCU (4101KS)
  • ECU [4000KS]
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 73-25-34-000-040
Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040
Installation of the Engine Interface Unit (EIU)
AMM 78-31-00-710-040
Operational Test of the Thrust Reverser System
AMM 78-31-00-710-042
Operational Test of the Thrust Reverser System
AMM 78-31-17-210-001
Detailed Visual Inspection of the Deploy Switches and Triggers
AMM 78-31-18-210-001
Detailed Visual Inspection of the Stow-switches (4104ks1,4104ks2,4104ks3,4104ks4)
AMM 78-31-18-210-040
Detailed Visual Inspection of the Stow-switches
AMM 78-31-41-210-042
Detailed Inspection of Actuator Rod End Attachments (Blocker Doors Deployed)
AMM 78-31-42-210-040
Detailed Visual Inspection of the Electrical Harness
AMM 78-31-42-210-041
Detailed Visual Inspection of the electrical Harness
AMM 78-31-49-210-002
General Visual Inspection of Hydraulic Tubing and Hoses (Blocker Doors Deployed)
AMM 78-31-51-000-040
Removal of the Hydraulic Control Unit
AMM 78-31-51-000-042
Removal of the Hydraulic Control Unit
AMM 78-31-51-400-040
Installation 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
AMM 78-32-41-860-040
Manual Deployment of the Blocker Door
3. Fault Confirmation
Subtask 78-31-00-710-188-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do an operational test of the Trust reverser system AMM 78-31-00-710-040.
Subtask 78-31-00-710-188-B ** ON A/C NOT FOR ALL
A. Test
   (1) Do an operational test of the Trust reverser system AMM 78-31-00-710-042.
4. Fault Isolation
Subtask 78-31-00-810-132-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message EIU, HCU:
   (1) If damage is found:
  • repair or replace as necessary.
   (2) If nothing is found:
     (a) If damage is found:
  • repair or replace as necessary.
     (b) If nothing is found:
       1 If damaged is found:
  • repair or replace as necessary.
       2 if nothing is found:
         a If damage is found:
  • repair or replace as necessary.
         b if nothing is found:
Subtask 78-31-00-810-132-D ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message TR LOCK, TR ACT DPLSW
   (1) If damage is found:
  • repair or replace as necessary.
   (2) If nothing is found:
     (a) If damage is found:
  • repair or replace as necessary.
     (b) If nothing is found:
       1 If damaged is found:
  • repair or replace as necessary.
       2 if nothing is found:
  • Inspect the deploy switches levers AMM 78-31-17-210-001.
    * 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) AMM TASK 78-31-17-000-040 and AMM TASK 78-31-17-400-040
    ** If nothing is found:
  • Do a detailed visual inspection of the electrical harness AMM 78-31-42-210-041
         a If damage is found:
  • repair or replace as necessary.
         b if nothing is found:
Subtask 78-31-00-710-189-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:38:05 UTC
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