D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
 the Ground Connector 49-00-00-860-008 APU Start by External Power (131-9(A)) 49-00-00-860-009 APU Shutdown by External Power (131-9(A)) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 49-91-14-991-002 Fig. 401
 3. Job Set-up
__________
 Subtask 49-91-14-860-054
 A. Aircraft Maintenance Configuration
 (1)
 Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

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

 (3)
 Put 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 49-91-14-865-056
 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

R  EFF : 001-049, 101-105, 107-107, 151-199, 49-91-14Page 406 201-210, Config-2 Aug 01/05
 CES  Subtask 49-91-14-010-053

 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 52-41-00-010-001).

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

 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-91-14-991-002) Subtask 49-91-14-420-051
 A. Installation of the Differential Pressure Switches
 (1)
 Lubricate the new O-rings (2) and (3) with OILS (Material No. 03-002).

 (2)
 Install the new O-ring (2) and O-ring (3) on the switches (4).

 (3)
 Remove the blanking plugs from the filter housings (1).

 (4)
 Install the switches (4) into oil filter housings (1).

 (5)
 TORQUE the switches to 3.3 m.daN (24.33 lbf.ft).

 (6)
 Remove the blanking caps from the electrical connectors (5).

 (7)
 Connect the electrical connectors (5) to the switches (4). Subtask 49-91-14-865-057

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

 Subtask 49-91-14-790-051
 C. Test
 (1)
 Start the APU (Ref. TASK 49-00-00-860-008).

 (2)
 Stop the APU (Ref. TASK 49-00-00-860-009).

R  EFF : 001-049, 101-105, 107-107, 151-199, 49-91-14Page 407 201-210, Config-2 Aug 01/05
 CES

 (3) Make an inspection of the switches (4) for oil leaks.
 NOTE : Leaks are not permitted.

____
 ________

5. Close-up
 Subtask 49-91-14-410-052
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

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

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

 (4)
 Remove the access platform(s). Subtask 49-91-14-860-055

 B.
 Aircraft Maintenance Configuration

 (1)
 Pressurize the reservoirs of the hydraulic systems.
 (Ref. TASK 29-14-00-614-002).

 (2)
 De-energize the ground service network
 (Ref. TASK 24-42-00-862-001).

 (3)
 Remove the warning notice(s).

R  EFF : 001-049, 101-105, 107-107, 151-199, 49-91-14Page 408 201-210, Config-2 Aug 01/05
 CES

 SWITCH - DIFFERENTIAL PRESSURE, OIL PUMP - REMOVAL/INSTALLATION
_______________________________________________________________

R **ON A/C 001-003, 051-099, 401-499,
 TASK 49-91-15-000-001
 Removal of the Oil Pump Differential Pressure - Switch (GTCP36-300)
　
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