W DOC AIRBUS | AMM A320F

Removal of the Engine Pump Pressure Switch

TASK 29-11-17-000-010-A
Removal of the Engine Pump Pressure Switch

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: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.
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.
FIN: 1074GK ** ON A/C NOT FOR ALL
1. Reason for the Job
This task gives the procedure to remove the hydraulic-pump LP-warning switch.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific
AR
CAP - BLANKING
No specific
AR
CONTAINER 5 L (1.32 USGAL)
No specific
AR
COVER - PROTECTION
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V02-147)
lockwire
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
F Engine Pump Pressure Switch
FOR [1000EM1] (ENGINE-1)
TASK 71-13-00-010-010-A
Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
3. Job Set-up
Subtask 29-11-17-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001)
   (2) Depressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-001).
   (3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
  • on the ground service panel 197CB.
   (4) Put a WARNING NOTICE(S) on the access door 195BB to tell persons not to pressurize the Green hydraulic reservoir.
Subtask 29-11-17-941-050-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) On the center pedestal, on the ENG panel 115VU:
  • 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) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system:
  • in the cockpit, on the HYD section of the overhead panel 40VU.
   (4) On the overhead maintenance panel 50VU:
  • make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
   (5) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
   (6) Put a CONTAINER 5 L (1.32 USGAL) below the hydraulic tube connection to the pressure switch to catch the remaining fluid.
Subtask 29-11-17-865-050-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
Subtask 29-11-17-010-050-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the left fan cowl:
     (a) FOR [1000EM1] (ENGINE-1)
open the door 437AL (Ref. AMM TASK 71-13-00-010-010).
   (2) Put an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position at the zone 400.
4. Procedure
Subtask 29-11-17-020-050-B ** ON A/C NOT FOR ALL
A. Removal of the Engine Pump Pressure Switch
   (1) Make a note of the position of the electrical connector (4), the pressure switch (3) and the packing (2). They must be put in the same position on installation.
   (2) Cut and remove the lockwire (Material No.V02-147) (6) from the anchor tab (5).
   (3) Disconnect the electrical connector (4) from the pressure switch (3).
   (4) Remove the bolt (8) that attaches the P-clip (7) to the clipnut (10), on the bracket (9).
   (5) Remove the P-clip (7) from around the switch (3).
   (6) Put the CONTAINER 5 L (1.32 USGAL) in position below the pressure switch (3).
   (7) Hold the adapter (1) with an applicable wrench and remove the pressure switch (3).
   (8) Remove and discard the packing (2) from the pressure switch (3).
   (9) Put the applicable COVER - PROTECTION, CAP - BLANKING, PLUG - BLANKING on all the openings.
[Rev.10 from 2021] 2026.04.01 00:14:38 UTC
"Aviabrain" 2025