W DOC AIRBUS | AMM A320F

Removal of the Engine-Pump Pressure Switch

TASK 29-13-17-000-802-A
Removal of the Engine-Pump Pressure Switch

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.
ZONE: 480
FIN: 3074GD ** 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 3M (10 FT)- ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
1
CONTAINER 20L (5 USGAL)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
No specific
1
WRENCH - CROWFOOT
98D27803000000
1
LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
480
ENGINE 2 AFT PYLON
195BB, 198CB
 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
Retraction of the Flaps on the Ground
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 54-54-00-000-802-A
Removal of the Rear Pylon Fairing (RPF)
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
F Engine-Pump Pressure Switch
3. Job Set-up
Subtask 29-13-17-860-060-A ** ON A/C NOT FOR ALL
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 flaps are in the fully retracted position (Ref. AMM TASK 27-50-00-866-009).
Subtask 29-13-17-941-058-A ** ON A/C NOT FOR ALL
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.
   (3) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
  • On the HYD section of panel 40VU
  • On the ground-service panel of 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) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
   (6) 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) on the flap/slat control lever to tell persons not to operate the flap/slat controls.
Subtask 29-13-17-865-062-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDH02
** ON A/C NOT FOR ALL
49VUHYDRAULIC/Y HYD/PUMP ENG2 ALT3710GDE12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
Subtask 29-13-17-020-056-A ** ON A/C NOT FOR ALL
D. Remove the rear pylon fairing (Ref. AMM TASK 54-54-00-000-802).
Subtask 29-13-17-010-054-A ** ON A/C NOT FOR ALL
E. Get Access
   (1) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at the rear pylon.
4. Procedure
Subtask 29-13-17-020-057-A ** ON A/C NOT FOR ALL
A. Removal of the Engine-Pump Pressure Switch
   (1) Put a CONTAINER 20L (5 USGAL) below the pressure switch to collect the remaining fluid.
   (2) Disconnect the electrical connector (1) from the pressure switch (2).
   (3) Put CAP - BLANKING on the electrical connector (1).
   (4) At the pressure-switch port of the manifold (4), install a WRENCH - CROWFOOT on the flats to hold the manifold (4).
   (5) Remove the pressure switch (2).
   (6) Remove and discard the packing (3).
   (7) Put CAP - BLANKING on the pressure switch (2) and to the pressure-switch port of the manifold (4).
[Rev.10 from 2021] 2026.04.01 00:20:03 UTC
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