(2)
 On the panel 25VU make sure that the APU MASTER SW p/bsw is OFF.

 (3)
 Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.

 (4)
 Make sure that hydraulic systems are depressurized
 (Ref. TASK 29-00-00-864-001).

 Subtask 49-91-22-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41

 Subtask 49-91-22-010-053
 C. Get Access
 (1)
 Put the access platform in position below the APU access doors 315AL and 316AR.

 (2)
 Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).

 (3)
 Set the LIGHT SW 11LJ to the ON position.

 4. Procedure
_________ Subtask 49-91-22-420-052
 A. Installation of the Oil-Pump Differential-Pressure Indicator
 (1)
 Remove the blanking plug from the differential-pressure indicator opening.

 (2)
 Apply a thin layer of OILS (Material No. 03-002) to the new packing (3).

 (3)
 Install the new O-ring (3) to the differential pressure indicator (1).

 (4)
 Apply a thin layer of lubricant to the new packing (4).

 (5)
 Install the new O-ring (4) on the differential pressure indicator (1).

 (6)
 Install the differential pressure indicator (1) to the oil pump assembly (2).

 (7)
 TORQUE the differential pressure indicator to between 2.04 and 2.16 m.daN (15.04 and 15.92 lbf.ft) and safety the differential pressure indicator (1) with MISCELLANEOUS (Material No. 19-010).

 Subtask 49-91-22-410-050
 B. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Close the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-410-001).

 Subtask 49-91-22-865-052
 C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
 Subtask 49-91-22-710-053
 D. Start and operate the APU.
 (1)
 Start the APU (Ref. TASK 49-00-00-860-003).

 (2)
 Allows the APU to run 5 minutes.

 (3)
 Shutdown the APU (Ref. TASK 49-00-00-860-004).

 (4)
 Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).

 (5)
 Make an inspection of the oil-pump pressure-differential indicator for leaks.

 NOTE : No leakage is permitted.
____
 (6) Do a visual check of the oil quantity in the APU. Add oil if the oil level is on or less than the ADD mark on the sight glass (Ref. TASK 49-90-00-600-001).

 5. Close-up
________ Subtask 49-91-22-410-051
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Set the LIGHT SW 11LJ to the OFF position.

 (3)
 Close the APU access door 315AL, 316AR (Ref. TASK 52-41-00-010-001).

 (4)
 Remove the access platform(s). Subtask 49-91-22-865-054

 B.
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.

 Subtask 49-91-22-860-055
 C. Aircraft Maintenance Configuration
 (1)
 De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

 (2)
 Pressurize the reservoirs of the hydraulic systems.
 (Ref. TASK 29-14-00-614-002).

 (3)
 Remove the warning notice(s).

 SWITCH AND INDICATOR - DIFFERENTIAL PRESSURE, LUBE PUMP FILTER
______________________________________________________________ REMOVAL/INSTALLATION
____________________
 TASK 49-91-23-000-001
 Removal of the Lube Pump-Filter Differential-Pressure Switch and Indicator (APS 3200)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
　
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