Subtask 49-91-52-710-050
 E. Do the Operational Test of the APU and do a Leak Check
 (1)
 Do the operational Test of the APU (Ref. TASK 49-00-00-710-004).

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

 (3)
 Do a leak check of the APU oil system.
 NOTE : No leaks are permitted.

____ Subtask 49-91-52-865-053
 F. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
 5. Close-up
________ Subtask 49-91-52-410-051
 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 positon.

 (3)
 Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).

 (4)
 Remove the access platform(s). Subtask 49-91-52-865-054

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

 Subtask 49-91-52-860-052
 C. 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).

 SEAL - TURBINE BEARING CAVITY VENT AND LUBRICATION ((GTCP 36-300))
__________________________________________________________________ MAINTENANCE PRACTICES
_____________________
R **ON A/C 001-003, 051-099, 401-499,
 TASK 49-91-53-000-001
 Removal of turbine bearing cavity vent and lubrication tube packing (GTCP
 36-300)

 1. Reason for the Job
__________________
 To prevent unnecessary APU removal if high oil consumption is experienced.
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
 No specific warning notice
 No specific access platform 3.5 m (11 ft. 6 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
 Configuration before Maintenance Action
 52-41-00-010-001 Open the APU Doors for Access
 49-91-53-991-001 Fig. 201
 49-91-53-991-002 Fig. 202

 3. Job Set-up
__________ Subtask 49-91-53-860-050
 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 49-91-53-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
 Subtask 49-91-53-010-050
 C. Get Access
 (1)
 Put the access platform below the APU access doors 315AL and 316AR.

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

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

 4. Procedure
_________
 (Ref. Fig. 201/TASK 49-91-53-991-001, 202/TASK 49-91-53-991-002) Subtask 49-91-53-020-050
 A. Removal of the Turbine Bearing Cavity Vent
 (1)
 Disconnect tube (9) from check valve (8).

 (2)
 Remove bolts (1) and washers (2).
　
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