Thrust Reverser Fault on Engine 1

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1. Possible Causes
· LOCK IND/PROX SENSOR-THRUST REV LOWER R ACTUATOR ( 4006KS )
· LOCK IND/PROX SENSOR-THRUST REV LOWER L ACTUATOR ( 4007KS )
· HCU-THRUST REV, 1 ( 4101KS1 )
· LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS )
· LVDT-THRUST REV UPPER L ACTUATOR ( 4004KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External
Power
Ref. AMM 31-60-00-860-002 EIS Stop Procedure
Ref. AMM 71-13-00-010-010 Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 78-31-00-710-041 Operational Test of the Thrust Reverser System with the CFDS
Ref. AMM 78-31-51-000-010 Removal of the Thrust Reverser Hydraulic Control Unit
Ref. AMM 78-31-51-400-010 Installation of the Thrust Reverser Hydraulic Control Unit
Ref. AMM 78-32-00-010-010 Opening of the Thrust Reverser Halves
Ref. AMM 78-32-00-410-010 Closing of the Thrust Reverser Halves
Ref. AMM 78-32-43-000-010 Removal of the C-Duct Locking Actuator
Ref. AMM 78-32-43-400-010 Installation of the C-Duct Locking Actuator
Ref. AMM 78-32-48-000-010 Removal of the C-Duct Non-Locking Actuator
Ref. AMM 78-32-48-400-010 Installation of the C-Duct Non-Locking Actuator
3. Fault Confirmation
Subtask 78-30-00-710-194-A
A. Test
Do the operational test of the thrust reverser system with the CFDS (through FADEC 1A and 1B menus)
Ref. AMM 78-31-00-710-041 .
4. Fault Isolation
Subtask 78-30-00-810-140-A
A. If the test gives the maintenance message TR TUBES/HCU/TR ACT1:
· Open the fan cowls 437AL and 438AR Ref. AMM 71-13-00-010-010 .
· Open the thrust reverser halves 451AL and 452AR Ref. AMM 78-32-00-010-010 .
(1) Examine the tubes between:
· The thrust reverser HCU (4101KS1) and the locking actuators (4006KS) and (4007KS)
· The thrust reverser HCU (4101KS1) and the non-locking actuators (4003KS) and (4004KS) for
signs of hydraulic leaks. Repair as necessary.
(2) If no fault found:
· Replace LOCK IND/PROX SENSOR-THRUST REV LOWER R ACTUATOR ( 4006KS )
and LOCK IND/PROX SENSOR-THRUST REV LOWER L ACTUATOR ( 4007KS ) Ref.
AMM 78-32-43-000-010 and Ref. AMM 78-32-43-400-010 .
(3) If the fault continues:
· Replace HCU-THRUST REV, 1 ( 4101KS1 ) Ref. AMM 78-31-51-000-010 and Ref.
AMM 78-31-51-400-010 .
(4) If the fault continues:
· Replace LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS ) and LVDT-THRUST
REV UPPER L ACTUATOR ( 4004KS ) Ref. AMM 78-32-48-000-010 and Ref.
AMM 78-32-48-400-010 .
Subtask 78-30-00-710-195-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 78-30-00-860-104-A
A. Put the aircraft back to its initial configuration.
(1) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF
Ref. AMM 31-60-00-860-002 .
(2) On the panel 50VU, push the ENG/FADEC GND PWR/1 pushbutton switch.
(3) De-energize the aircraft electrical circuits Ref. AMM 24-41-00-862-002 .
(4) Make sure that the thrust reverser halves 451AL and 452AR are closed Ref.
AMM 71-13-00-410-010 .
(5) Make sure that the fan cowls 437AL and 438AR are closed Ref. AMM 78-32-00-410-010 . [Rev.6 from Feb 2017] 2026.04.04 04:38:08 UTC