Thrust Reverser Stowed Position Set, Reverser Indication stays Amber on Engine 1

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1. Possible Causes
· wiring
· LOCK IND/PROX SENSOR-THRUST REV LOWER R ACTUATOR ( 4006KS )
· LOCK IND/PROX SENSOR-THRUST REV LOWER L ACTUATOR ( 4007KS )
2 Job Set-up Information
A. Referenced Information
REFERENCE DESIGNATION
Ref. ASM 73-25-16
Ref. AMM 78-31-00-710-041 Operational Test of the Thrust Reverser System with the CFDS
Ref. AMM 78-32-00-860-010 Manual Extension of the Thrust Reverser Translating Sleeves
Ref. AMM 78-32-00-860-011 Manual Retraction of the Thrust Reverser Translating Sleeves
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
3. Fault Confirmation
Subtask 78-30-00-710-086-A
A. Test
(1) 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 78-30-00-810-070-A
A. If the thrust reverser does not stow:
· do a check of the thrust reverser system to make sure that the translating sleeves move freely Ref.
AMM 78-32-00-860-010 and Ref. AMM 78-32-00-860-011 .
Subtask 78-30-00-810-071-A
B. If the thrust reverser stows:
· do a check and repair the wiring :
. from the right lock indicator/proximity sensor (4006KS) pin A to the first derivation
. from the left lock indicator/proximity sensor (4007KS) pin A to the first derivation Ref. ASM
73-25-16.
(1) 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 .
Subtask 78-30-00-710-087-A
C. Do the test given in Para. 3. [Rev.6 from Feb 2017] 2026.04.04 04:38:07 UTC