D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
 External Power 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 49-00-00-860-003 APU Start by External Power (GTCP 36-300) 49-00-00-860-004 APU Shutdown by External Power (GTCP 36-300) 52-14-00-010-001 52-41-00-410-001 Close the APU Doors after Access 49-91-15-991-001 Fig. 401
 3. Job Set-up
__________
 Subtask 49-91-15-860-051
 A. Aircraft Maintenance Configuration
 (1)
 On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.

 (2)
 Put a warning notice in the cockpit to tell persons not to start the APU.

 (3)
 Make sure that hydraulic systems are depressurized
 (Ref. TASK 29-14-00-614-001).

 (4)
 Energize the ground service network
 (Ref. TASK 24-41-00-861-002).

 Subtask 49-91-15-865-051
 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 49-91-15-010-051
 C. Get Access
 (1)
 Put the access platform in position below the access doors 315AL, 316AR.

 (2)
 Open the access doors 315AL and 316AR (Ref. TASK 52-14-00-010-001).

 (3)
 Set the light switch 11LJ to on.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-91-15-991-001) Subtask 49-91-15-420-050
 A. Installation of the Differential Pressure Switch
 (1)
 Install the new o-ring O-Ring (5) and the new o-ring O-Ring (7) on the differential pressure switch (6).

 (2)
 Apply a thin layer of oil OILS (Material No. 03-002) to the new O-rings.

 (3)
 Install the differential pressure switch into oil filter housing.

 (4)
 TORQUE the differential pressure switch to between 3.3 and 3.56 m.daN

 (24.33 and 26.25 lbf.ft) and safety with MISCELLANEOUS (Material No. 19-010).

 (5)
 Connect the electrical connector to the differential pressure switch (6).

 Subtask 49-91-15-865-052
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD  Subtask 49-91-15-790-050

 C. Test
 (1)
 Start the APU (Ref. TASK 49-00-00-860-003).

 (2)
 Make an inspection of the pressure differential switch (6) for oil leaks.

 NOTE : Leaks are not permitted.
____
 (3) Stop the APU (Ref. TASK 49-00-00-860-004).
 5. Close-up
________ Subtask 49-91-15-410-051
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Set the light switch 11LJ to off.

 (3)
 Close the access door 315AL (Ref. TASK 52-41-00-410-001).

 (4)
 Remove the access platform(s). Subtask 49-91-15-860-052

 B.
 Aircraft Maintenance Configuration

 (1)
 Pressurize the reservoirs of the hydraulic systems.

 (2)
 De-energize the ground service network

 (3)
 Remove the warning notice(s).

 INDICATOR - DIFFERENTIAL PRESSURE, GENERATOR SCAVENGE - REMOVAL/INSTALLATION
____________________________________________________________________________ R **ON A/C 001-003, 051-099, 401-499,
 TASK 49-91-21-000-001 Removal of the Differential Pressure Indicator (8073KM) (GTCP 36-300) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______
 WHEN YOU DO THE MAINTENANCE TASK(S).

 WARNING : CUT, REMOVE AND DISCARD THE LOCKWIRE AS YOU DO THE TASK. LOOSE
_______
 LOCKWIRE CAN CUT OR BLIND YOU.

 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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