DOC AIRBUS | TSM A320FFailure of the Thrust Reverser System on Engine 2
1. Possible Causes
· harness from the EEC (4000KS) to the thrust reverser HCU (4101KS)
· harness from the EEC (4000KS) to the non-locking actuators (4003KS) and (4004KS)
· harness from the EEC (4000KS) to the locking actuators, (4006KS) and (4007KS)
· HCU-THRUST REV (4101KS)
· LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS )
· LVDT-THRUST REV UPPER L ACTUATOR ( 4004KS )
· LOCK IND/PROX SENSOR-THRUST REV LOWER R ACTUATOR ( 4006KS )
· LOCK IND/PROX SENSOR-THRUST REV LOWER L ACTUATOR ( 4007KS )
· EEC ( 4000KS )
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 70-23-15-912-010 Connection of Electrical Connectors
Ref. AMM 71-13-00-410-010 Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
Ref. AMM 71-50-00-210-010 Wire Harness Visual Inspection - All Power Plant Electrical Cables
Ref. AMM 73-22-34-000-010 Removal of the Electronic Engine Control (EEC)
Ref. AMM 73-22-34-400-010 Installation of the Electronic Engine Control (EEC)
Ref. ASM 73-25-16
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 78-32-00-410-010 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 78-30-00-710-210-A
A. Test
(1) Do the operational test of the thrust reverser system with the CFDS (through the FADEC 2A and 2B
menus) Ref. AMM 78-31-00-710-041 .
4. Fault Isolation
Subtask 78-30-00-810-147-A
A. If the test gives the maintenance message TUBES/LKACTS/NLKACTS2:
· examine the harness from the EEC (4000KS) to the thrust reverser HCU (4101KS)
· examine the harness from the EEC (4000KS) to the non-locking actuators (4003KS) and (4004KS)
· examine the harness from the EEC (4000KS) to the locking actuators, (4006KS) and (4007KS) Ref.
ASM 73-25-16 Ref. AMM 71-50-00-210-010 .
(1) If the fault continues:
· disconnect the connectors from:
. the thrust reverser HCU (4101KS)
. the non-locking actuators (4003KS) and (4004KS)
. the locking actuators (4006KS) and (4007KS).
· examine the connectors and receptacles Ref. AMM 71-50-00-210-010
· connect the connectors to :
. the thrust reverser HCU (4101KS)
. the non-locking actuators (4003KS) and (4004KS)
. the locking actuators (4006KS) and (4007KS) Ref. AMM 70-23-15-912-010 .
(2) If the fault continues:
· replace the HCU-THRUST REV (4101KS) Ref. AMM 78-31-51-000-010 and Ref.
AMM 78-31-51-400-010 .
(3) If the fault continues:
· replace the LVDT-THRUST REV UPPER R ACTUATOR ( 4003KS ) and the LVDTTHRUST
REV UPPER L ACTUATOR ( 4004KS ) Ref. AMM 78-32-48-000-010 and Ref.
AMM 78-32-48-400-010 .
(4) If the fault continues:
· replace the LOCK IND/PROX SENSOR-THRUST REV LOWER R ACTUATOR ( 4006KS )
and the 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 .
(5) If the fault continues:
· replace the EEC ( 4000KS ) Ref. AMM 73-22-34-000-010 and Ref. AMM 73-22-34-400-010 .
Subtask 78-30-00-710-211-A
B. Do the test given in Para. 3.
5. Close-up
Subtask 78-30-00-860-113-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 PWR2 pushbutton switch.
(3) De-energize the aircraft electrical circuits Ref. AMM 24-41-00-862-002 .
(4) Make sure that the thrust reverser halves 461AL and 462AR are closed Ref.
AMM 78-32-00-410-010 .
(5) Make sure that the fan cowls 447AL and 448AR are closed Ref. AMM 71-13-00-410-010 . [Rev.6 from Feb 2017] 2026.04.04 04:38:10 UTC