W DOC AIRBUS | AMM A320F

Installation of the Primary Lock Proximity Sensor [CFML]

TASK 78-31-13-400-802-A
Installation 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.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 4032EG
FIN: 4033EG
FIN: 4040EG
FIN: 4041EG
1. Reason for the Job
This procedure gives the instructions for the installation 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
WARNING NOTICE(S)
No specific
Torque wrench: range to between 30 and 20 lbf.in (0.34 and 0.23 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CPNCL00062)
LUBRICATING OIL TURBINE ENGINE SYNT BASE
 C. 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
 D. 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 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 73-29-00-740-804-A
Thrust Reverser Cycling Test (Menu Mode)
TASK 78-31-41-040-802-A
Unlocking of the Thrust-Reverser Upper Actuators
TASK 78-31-41-440-802-A
Locking of the Thrust-Reverser Upper Actuators
F Primary Lock Proximity Sensors
3. Job Set-up
Subtask 78-31-13-941-054-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) Make sure that the WARNING NOTICE(S) are 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) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 78-31-13-010-057-A
B. Get Access
   (1) Make sure that the fan cowl doors are open (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) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
   (3) Make sure that the two upper actuators are unlocked (Ref. AMM TASK 78-31-41-040-802).
4. Procedure
Subtask 78-31-13-420-051-A
A. Installation of the Primary Lock Proximity Sensor
   (1) Remove all the COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
   (2) Lubricate the threads of the bolts (2) or (6) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
   (3) Put the proximity sensor (3) or (5) in position on the actuator (4).
   (4) Install the two bolts (2) or (6) that attach the proximity sensor (3) or (5) to the actuator (4).
   (5) TORQUE the two bolts (2) or (6) to between 30 and 20 lbf.in (0.34 and 0.23 m.daN ) T.
   (6) Connect the electrical connector (1) or (7) to the proximity sensor (3) or (5) (Ref. AMM TASK 70-70-00-910-804).
   (7) Lock the two upper actuators (Ref. AMM TASK 78-31-41-440-802).
5. Close-up
Subtask 78-31-13-410-050-A
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
Subtask 78-31-13-710-051-A
B. Test(s)
   (1) Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
[Rev.10 from 2021] 2026.04.01 03:35:01 UTC
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