W DOC AIRBUS | AMM A320F

Removal of the Primary Lock Proximity Sensor [CFML]

TASK 78-31-13-000-802-A
Removal of the Primary Lock Proximity Sensor

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
FIN: 4032EG
FIN: 4033EG
FIN: 4040EG
FIN: 4041EG
1. Reason for the Job
This procedure gives the instructions for the removal of the primary lock proximity sensors. Two proximity sensors are installed on each of the two upper actuators on the thrust reverser:
  • Upper left actuator, channel A proximity sensor (4032EG)
  • Upper left actuator, channel B proximity sensor (4040EG)
  • Upper right actuator, channel A proximity sensor (4033EG)
  • Upper right actuator, channel B proximity sensor (4041EG).
NOTE: The two upper actuators are referred to as the Synchronized Locking Feedback Actuators (SLFAs).
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M(3 FT)
No specific
AR
CAP - PROTECTION
No specific
AR
COVER - PROTECTION
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 70-70-00-910-804-A
Electrical Standard Practices
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 78-31-41-040-802-A
Unlocking of the Thrust-Reverser Upper Actuators
F Primary Lock Proximity Sensors
3. Job Set-up
Subtask 78-31-13-941-053-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Put WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 78-31-13-010-056-A
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Put an ACCESS PLATFORM 1M(3 FT) in position.
   (3) Unlock the two upper actuators (Ref. AMM TASK 78-31-41-040-802).
4. Procedure
Subtask 78-31-13-020-051-A
A. Removal of the Primary Lock Proximity Sensor
   (1) Disconnect the electrical connector (1) or (7) from the proximity sensor (3) or (5) (Ref. AMM TASK 70-70-00-910-804).
   (2) Remove the two bolts (2) or (6) that attach the proximity sensor (3) or (5) to the actuator (4).
   (3) Remove the proximity sensor (3) or (5).
   (4) Install all the COVER - PROTECTION and CAP - PROTECTION on the openings, tubes, hoses and connectors.
[Rev.10 from 2021] 2026.04.01 03:35:00 UTC
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