W DOC AIRBUS | AMM A320F

Installation of the Low Oil Pressure Switch [CFMI]

TASK 79-34-15-400-040-A
Installation of the Low Oil Pressure Switch

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 4000EN ** 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
AR
PLIERS - CONNECTOR, JAW, SOFT
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 36 and 32 lbf.in (0.41 and 0.36 m.daN ) T
No specific
Torque wrench: range to between 120 and 110 lbf.in (1.36 and 1.24 m.daN ) T
No specific
Torque wrench: range to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CP1041)
isopropyl alcohol
(Material No.CP2244)
primer 1200
(Material No.CP2442)
engine oil
(Material No.CP8001)
lockwire 0.032 in. (0.8 mm) dia.
(Material No.14SBA1)
Textile-Lint free Cotton -
No specific
primer SS-4004
No specific
silicone sealant DC 90-006
No specific
silicone sealant RTV-88
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
30
PACKING
AIPC 79-34-15-01-020
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 71-00-00-710-006-A
Minimum Idle Check
TASK 71-13-00-010-040-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A
Closing of the Fan Cowl Doors
F Low Oil Pressure Switch (PRE SB RA320 79-8)
F Low Oil Pressure Switch (POST SB RA320 79-8)
3. Job Set-up
Subtask 79-34-15-860-052-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
   (2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 79-34-15-865-061-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUANTI ICE/PROBES/AOA/14DA1D04
49VUANTI ICE/PROBES/PITOT/13DA1D02
122VUANTI ICE/PROBES/2/TAT1DA2Y15
122VUANTI ICE/PROBES/2/PITOT3DA2Y14
122VUANTI ICE/PROBES/2/AOA4DA2Y13
122VUANTI ICE/PROBES/2/STATIC5DA2Y11
122VUANTI ICE/PROBES/3/PITOT3DA3Z16
122VUANTI ICE/PROBES/3/AOA4DA3Z15
122VUANTI ICE/PROBES/3/STATIC5DA3Z14
122VUANTI ICE/PROBES/1/STATIC5DA1Z13
122VUANTI ICE/PROBES/1/TAT1DA1Z12
Subtask 79-34-15-865-062-A ** ON A/C NOT FOR ALL
WARNING: OPEN THE PROBE HEATER AND WINDOW HEATER CIRCUIT-BREAKERS BEFORE YOU OPEN THE PHC AND WHC CIRCUIT BREAKERS. IF YOU DO NOT OBEY THIS SEQUENCE:
  • THE PROBES WILL BECOME TOO HOT.
  • THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUANTI ICE/PROBES/PHC/12DA1D03
122VUANTI ICE/WHC/25DG2W13
122VUANTI ICE/WHC/15DG1X13
122VUANTI ICE/PROBES/PHC/32DA3Y16
122VUANTI ICE/PROBES/PHC/22DA2Y12
Subtask 79-34-15-010-055-A ** ON A/C NOT FOR ALL
D. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
   (1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
   (2) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 79-34-15-640-051-A ** ON A/C NOT FOR ALL
E. Lubricating of Packing
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
   (1) Lubricate the packing (30) with engine oil (Material No.CP2442) .
Subtask 79-34-15-110-051-A ** ON A/C NOT FOR ALL
F. Cleaning of the Pressure Switch
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
   (1) To be sure of a good electrical bond between the low oil pressure switch (10) and the bracket, clean the mating surfaces. Use a Textile-Lint free Cotton - (Material No.14SBA1) wet with isopropyl alcohol (Material No.CP1041) .
4. Procedure
Subtask 79-34-15-910-050-A ** ON A/C NOT FOR ALL
A. Precautions
NOTE: The low oil pressure switch looks like the oil-filter differential-pressure switch. Installation of the incorrect switch could cause engine damage.
Subtask 79-34-15-420-052-A ** ON A/C NOT FOR ALL
B. Installation of the Switch
   (1) Remove the protective covers from the tubes and the switch.
   (2) Install the switch (10) on the bracket with the bolts (15) and the washers (20). TORQUE the bolts to between 36 and 32 lbf.in (0.41 and 0.36 m.daN ) T.
Subtask 79-34-15-760-050-A ** ON A/C NOT FOR ALL
C. Do an Electrical Bond Resistance Check
NOTE: Make sure you do an electrical bond resistance check at each bolt location.
   (1) Put one lead of the ohmmeter on the flange of the pressure switch (10) near the bolt (15).
   (2) Put the other lead of the ohmmeter on the surface of the bracket.
   (3) The resistance measured between the ohmmeter leads must not be more than 0.0025 ohm. Do two more checks.
   (4) If the resistance is more than 0.0025 ohm, remove the pressure switch (10) and clean the mating surfaces again. Do this procedure until the resistance is less than 0.0025 ohm.
Subtask 79-34-15-390-050-A ** ON A/C NOT FOR ALL
D. Seal the Electrical Bond Surfaces
   (1) Using of Primer
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
     (a) Mix the primer 1200 (Material No.CP2244) or primer SS-4004 per the manufacturer's instructions.
     (b) Apply the primer around each bolthead, the pressure switch flange, and around the mating surface of the bracket.
NOTE: The minimum time for the primer to cure is one hour at 70 deg.F (21.1 deg.C).
   (2) Using of Sealant
     (a) Mix the silicone sealant DC 90-006 or the silicone sealant RTV-88 and the activator in accordance with the manufacturer's instructions.
NOTE: The sealant should not be applied when the temperature is below 50 deg.F (10 deg.C).
NOTE: Use the silicone sealant DC 90-006 with the primer (1200) or the silicone sealant RTV-88 with the primer (SS-4004).
     (b) Apply a layer of sealant between 0.010 in. and 0.020 in. (0.25m and 0.51m) thick around each bolthead, the pressure switch flange, and around the mating surface of the bracket.
     (c) Allow the sealant to cure for a minimum of 24 hours in accordance with the manufacturer's instructions.
NOTE: To decrease the cure time, allow the sealant to gel at ambient temperature for a minimum of 2 hours. After 2 hours of gel time, apply a maximum of 120 deg.F (49 deg.C) heat to the sealant for a minimum of 2 hours.
Subtask 79-34-15-420-053-B ** ON A/C NOT FOR ALL
E. Installation of the Unions, Connection of Tubes and Electrical Connector
F Low Oil Pressure Switch (POST SB RA320 79-8) ** ON A/C NOT FOR ALL
POST SB RA32079-8
   (1) Install AIPC 79-34-15-01-020 PACKING (30) on the union (25) and install the unions (25) in the switch (10). TORQUE the unions to between 120 and 110 lbf.in (1.36 and 1.24 m.daN ) T.
   (2) Connect the two oil tubes to the switch (10). TORQUE the coupling nuts to between 160 and 150 lbf.in (1.81 and 1.70 m.daN ) T.
NOTE: Use a second wrench to hold the unions when you torque the tube coupling nuts.
   (3) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (4) Make sure that all the electrical connections are clean and in the correct condition.
   (5) Connect the electrical connector 4000ENA to the switch (10). Tighten the connector fingertight then apply one-eight turn using PLIERS - CONNECTOR, JAW, SOFT.
   (6) Install the insulation on the switch.
     (a) Put the two halves of the insulation housing (40) on the switch (10).
WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
     (b) Use CP8001lockwire 0.032 in. (0.8 mm) dia. to attach the insulation housing (40).
  • attach the lockwire to the capstan on the insulation housing (40).
    END OF POST SB RA32079-8
Subtask 79-34-15-942-050-A ** ON A/C NOT FOR ALL
F. Remove the WARNING NOTICE(S).
Subtask 79-34-15-710-052-A ** ON A/C NOT FOR ALL
G. Do a minimum idle check (Ref. AMM TASK 71-00-00-710-006) and check the unions for leakage.
5. Close-up
Subtask 79-34-15-410-053-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 79-34-15-865-063-A ** ON A/C NOT FOR ALL
WARNING: CLOSE THE PHC AND WHC CIRCUIT BREAKERS BEFORE YOU CLOSE THE PROBE HEATER AND WINDOW HEATER CIRCUIT-BREAKERS. IF YOU DO NOT OBEY THIS SEQUENCE:
  • THE PROBES WILL BECOME TOO HOT.
  • THIS CAN CAUSE DAMAGE TO EQUIPMENT AND INJURY TO MAINTENANCE PERSONNEL.
B. Remove the safety clips and tags and close these circuit breakers in this sequence:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUANTI ICE/PROBES/PHC/12DA1D03
122VUANTI ICE/WHC/25DG2W13
122VUANTI ICE/WHC/15DG1X13
122VUANTI ICE/PROBES/PHC/32DA3Y16
122VUANTI ICE/PROBES/PHC/22DA2Y12
Subtask 79-34-15-865-064-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
49VUANTI ICE/PROBES/AOA/14DA1D04
49VUANTI ICE/PROBES/PITOT/13DA1D02
122VUANTI ICE/PROBES/2/TAT1DA2Y15
122VUANTI ICE/PROBES/2/PITOT3DA2Y14
122VUANTI ICE/PROBES/2/AOA4DA2Y13
122VUANTI ICE/PROBES/2/STATIC5DA2Y11
122VUANTI ICE/PROBES/3/PITOT3DA3Z16
122VUANTI ICE/PROBES/3/AOA4DA3Z15
122VUANTI ICE/PROBES/3/STATIC5DA3Z14
122VUANTI ICE/PROBES/1/STATIC5DA1Z13
122VUANTI ICE/PROBES/1/TAT1DA1Z12
[Rev.10 from 2021] 2026.04.01 03:38:39 UTC
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