W DOC AIRBUS | AMM A320F

Removal of the Filter Clogging Indicator [CFMB]

TASK 78-31-51-000-043-A
Removal of the Filter Clogging Indicator

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: WEAR A FACE SHIELD WHICH IS RESISTANT TO HIGH PRESSURE JETS WHEN YOU WORK ON PRESSURIZED SYSTEMS.
WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
  • FLUSH IT AWAY WITH CLEAN WATER
  • GET MEDICAL AID.
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
ACCESS PLATFORM 1M(3 FT)
No specific
AR
WARNING NOTICE(S)
CH1540-0276
1
SOCKET
M46104
1
SOCKET
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-010-040-B
Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-B
Make the Thrust Reverser Unserviceable for Maintenance
F Hydraulic Control Unit Filter Clogging Indicator
3. Job Set-up
Subtask 78-31-51-941-064-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
     (a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
   (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
   (3) On the overhead maintenance panel 50VU:
     (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
Subtask 78-31-51-010-076-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
   (2) Put the ACCESS PLATFORM 1M(3 FT) in position.
Subtask 78-31-51-040-066-A ** ON A/C NOT FOR ALL
C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).
Subtask 78-31-51-614-056-A ** ON A/C NOT FOR ALL
D. Depressurize the aircraft hydraulic systems
   (1) For engine 1 depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
   (2) For engine 2 depressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
4. Procedure
Subtask 78-31-51-020-060-A ** ON A/C NOT FOR ALL
A. Removal of the Filter Clogging Indicator from the Hydraulic Control Unit (HCU) as follows:
WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
  • FLUSH IT AWAY WITH CLEAN WATER
  • GET MEDICAL AID.
   (1) Put a Textile-Lint free Cotton - (Material No.14SBA1) on the engine below the HCU to protect it from any hydraulic fluid.
   (2) Cut the lockwire and remove the retaining ring (185) and the glass bowl (190) from the clogging indicator (195).
   (3) With the CH1540-0276 SOCKET or M46104 SOCKET, remove clogging indicator (195) from the HCU (20).
   (4) Remove and discard the packings (200) and (205) from the clogging indicator (195).
[Rev.10 from 2021] 2026.04.01 03:25:34 UTC
"Aviabrain" 2025