W DOC AIRBUS | AMM A320F

Removal of the Engine-2 Pump-Case-Drain Check-Valve

TASK 29-13-37-000-803-A
Removal of the Engine-2 Pump-Case-Drain Check-Valve

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: OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.
CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
CAUTION: BE CAREFUL WHEN YOU REMOVE THE CHECK VALVE AS THE HYDRAULIC FLUID WILL FLOW OUT.
ZONE: 423
FIN: 3041GM
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 3M (10 FT)- ADJUSTABLE
No specific
AR
CAP - PROTECTION
No specific
1
CONTAINER 20L (5 USGAL)
No specific
AR
PLUG - BLANKING
No specific
AR
WARNING NOTICE(S)
No specific
AR
WRENCH - STANDARD
98D27803000000
1
LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
423
UPPER FWD PYLON
195BB, 198CB
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 27-00-00-480-002-A
Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-50-00-866-009-A-01
Retraction of the Flaps/Slats on the Ground
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 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 78-30-00-040-807-A
Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
F Engine-2 Pump-Case-Drain Check-Valve
3. Job Set-up
Subtask 29-13-37-860-057-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002).
   (2) Depressurize the reservoir of the Yellow hydraulic system.
(Ref. AMM TASK 29-14-00-614-001).
   (3) Make sure that the slats are in the fully retracted position (Ref. AMM TASK 27-50-00-866-009).
Subtask 29-13-37-941-057-A
B. Safety Precautions
   (1) On AIR COND panel 30VU:
  • Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
  • Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.
   (2) Open access door 198CB.
     (a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system on the ground service panel.
   (3) On the HYD section of panel 40VU:
     (a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system.
   (4) Open access door 195BB:
     (a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Yellow hydraulic system.
   (5) On the center pedestal, on ENG panel 115VU:
  • Make sure that the ENG/MODE selector switch is in the NORM position.
  • 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.
  • Put WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
   (6) On the ENG section of maintenance panel 50VU:
  • Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
  • Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
   (7) On FLAPS panel 114VU:
  • Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
  • Put a WARNING NOTICE(S) in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.
Subtask 29-13-37-010-054-A
C. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
Subtask 29-13-37-040-050-A
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) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-807).
Subtask 29-13-37-010-055-A
E. Get Access
   (1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the pylon.
4. Procedure
Subtask 29-13-37-020-054-A
A. Removal of the Engine-2 Pump-Case-Drain Check-Valve
CAUTION: USE TWO WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS:
  • ONE WRENCH TO HOLD THE UNION, AND
  • ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT.
THIS PREVENTS DAMAGE TO THE PARTS.
   (1) Put a CONTAINER 20L (5 USGAL) in position below the check valve (3).
   (2) Hold the check valve (3) with a WRENCH - STANDARD and disconnect the tube (4) from the check valve (3).
   (3) Remove the check valve (3) from the flanged tee (1).
   (4) Remove and discard the O-ring (2).
   (5) Put PLUG - BLANKING on the disconnected tube (4) and flanged tee port.
   (6) Put CAP - PROTECTION on the two ends of the check valve (3).
[Rev.10 from 2021] 2026.04.01 00:20:41 UTC
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