W DOC AIRBUS | AMM A320F

Installation of the Hydraulic Control Unit (HCU) Proximity Sensor [PW11]

TASK 78-31-22-400-801-A
Installation of the Hydraulic Control Unit (HCU) Proximity Sensor

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
FIN: 100EG1 ** ON A/C NOT FOR ALL
FIN: 100EG2 ** ON A/C NOT FOR ALL
FIN: 101EG1 ** ON A/C NOT FOR ALL
FIN: 101EG2 ** ON A/C NOT FOR ALL
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
CAP - PROTECTION
No specific
AR
COVER - PROTECTION
No specific
1
PLIERS - NOSE, SOFT, LONG
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 125 and 103 lbf.in (1.41 and 1.16 m.daN ) T
A701191
1
HCU PROX. SENSOR INSTALL
A708405
1
PROX SENSOR R/I TOOL
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.PU5-0007)
A-A-59313 anti-seize compound, zinc dust petrolatum
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
2
TAB WASHERS
AIPC 78-31-86-10-030
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 71-00-00-860-832-A
Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A
Reactivation of the Thrust Reverser System after Ground Maintenance
F Hydraulic Control Unit (HCU) Proximity Sensors
F Hydraulic Control Unit (HCU) Proximity Sensors - Tab Washer Installation
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A
Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01
Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A
Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01
Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
3. Job Set-up
Subtask 78-31-22-941-051-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832)
Subtask 78-31-22-864-051-A ** ON A/C NOT FOR ALL
B. Depressurization of the Aircraft Hydraulic Systems
   (1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the applicable system.
     (a) On the overhead panel, on the HYD/FUEL panel 40VU.
     (b) On the ground service panel of the applicable hydraulic system.
   (2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
     (a) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
     (b) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
   (3) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
     (a) Make sure that the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-002).
     (b) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 78-31-22-865-051-A ** ON A/C NOT FOR ALL
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
121VUENG1/REV/LOCK1EG1N44
121VUICU A/ENG1 PWR SUPPLY22KS1R39
** ON A/C NOT FOR ALL
121VUICU B/ENG1 PWR SUPPLY101KS1R42
** ON A/C NOT FOR ALL
121VUENG1/REV/LOCK1EG1R44
121VUICU A/ENG1 PWR SUPPLY22KS1R38
** ON A/C NOT FOR ALL
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
121VUENG2/REV/LOCK1EG2N45
121VUICU A/ENG2 PWR SUPPLY22KS2R40
** ON A/C NOT FOR ALL
121VUICU B/ENG2 PWR SUPPLY101KS2R43
** ON A/C NOT FOR ALL
121VUENG2/REV/LOCK1EG2R45
121VUICU A/ENG2 PWR SUPPLY22KS2R39
Subtask 78-31-22-040-051-A ** ON A/C NOT FOR ALL
D. Deactivation of the Thrust Reverser System for Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 78-31-22-010-051-A ** ON A/C NOT FOR ALL
E. Get Access
   (1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
   (2) Make sure that the pylon access panel is removed:
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT
4. Procedure
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 78-31-22-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Hydraulic Control Unit (HCU) Proximity Sensor
   (1) Removal of the protection covers
CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
     (a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
   (2) Install the two proximity sensors (1) (100EG) and (4) (101EG).
     (a) Put the proximity sensors (1) and (4) on the sensor bracket.
     (b)
F Hydraulic Control Unit (HCU) Proximity Sensors ** ON A/C NOT FOR ALL
     (c) Install the two new AIPC 78-31-86-10-030 TAB WASHERS (2) on the proximity sensors (1) and (4).
     (d)
F Hydraulic Control Unit (HCU) Proximity Sensors - Tab Washer Installation ** ON A/C NOT FOR ALL
     (e) Apply the PU5-0007A-A-59313 anti-seize compound, zinc dust petrolatum the two lock nuts (3).
     (f) Install the two lock nuts (3) on the proximity sensors (1) and (4).
     (g) Hold the proximity sensors (1) and (4) in position with the A708405 PROX SENSOR R/I TOOL and TORQUE the lock nuts (3) to between 125 and 103 lbf.in (1.41 and 1.16 m.daN ) T.
     (h) Measure the distance between the proximity sensor spacer and the inhibit target. Make sure that the distance is between 0.867 in. (22.02 mm) and 0.0871 in. (2.21 mm).
     (i) Examine the position of the lock nuts (3) in relation to the tabs of the tab washers (2).
     (j)
F Hydraulic Control Unit (HCU) Proximity Sensors - Tab Washer Installation ** ON A/C NOT FOR ALL
       1 If necessary, tighten the lock nuts (3) more to adjust the position of the lock nuts (3). Do not loosen the lock nuts (3) to get the correct position.
     (k) Bend the tab washers (2) with the A701191 HCU PROX. SENSOR INSTALL to safety the two lock nuts (3).
     (l) Examine the installation of the tab washers (2). Make sure that:
  • The location tab is in the location tab hole.
  • The anti-rotation tabs are bent and flush against the flat side of the lock nuts (3).
  • The anti-rotation tabs prevent the rotation of the lock nuts (3).
  • There are no sharp corners, nicks or cracks at the bend of the anti-rotation tabs.
  • There is no damage on the surfaces or the protective treatment of the lock nuts (3) or on the mating components.
     (m) Remove the CAP - PROTECTION from the connectors of the proximity sensor harnesses.
     (n) Connect the CH A ICU proximity sensor harness to the proximity sensor (1) (100EG). Tighten the connector with your fingers.
     (o) Tighten the connector 1/8 to 1/4 of a turn more with the PLIERS - NOSE, SOFT, LONG.
     (p) Connect the CH B ICU proximity sensor harness to the proximity sensor (4) (101EG). Tighten the connector with your fingers.
     (q) Tighten the connector 1/8 to 1/4 of a turn more with the PLIERS - NOSE, SOFT, LONG.
5. Close-up
Subtask 78-31-22-440-050-A ** ON A/C NOT FOR ALL
A. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 78-31-22-410-050-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the access platform(s).
   (3) Install the access panel on the pylon:
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
413AT
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
423AT
   (4) Remove the WARNING NOTICE(S).
Subtask 78-31-22-865-052-A ** ON A/C NOT FOR ALL
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1000EM1 (ENGINE1)
121VUENG1/REV/LOCK1EG1N44
121VUICU A/ENG1 PWR SUPPLY22KS1R39
** ON A/C NOT FOR ALL
121VUICU B/ENG1 PWR SUPPLY101KS1R42
** ON A/C NOT FOR ALL
121VUENG1/REV/LOCK1EG1R44
121VUICU A/ENG1 PWR SUPPLY22KS1R38
** ON A/C NOT FOR ALL
FOR FIN: 1000EM2 (ENGINE2)
121VUENG2/REV/LOCK1EG2N45
121VUICU A/ENG2 PWR SUPPLY22KS2R40
** ON A/C NOT FOR ALL
121VUICU B/ENG2 PWR SUPPLY101KS2R43
** ON A/C NOT FOR ALL
121VUENG2/REV/LOCK1EG2R45
121VUICU A/ENG2 PWR SUPPLY22KS2R39
Subtask 78-31-22-863-050-A ** ON A/C NOT FOR ALL
D. Pressurization of the Aircraft Hydraulic Systems
   (1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
     (a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
   (2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
     (a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
[Rev.10 from 2021] 2026.04.01 03:31:28 UTC
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