4. Procedure
_________
 (Ref. Fig. 401/TASK 49-51-52-991-002) Subtask 49-51-52-020-051
 A. Removal of the Surge Control Valve (8058KM)
 (1)
 Disconnect the electrical connector (1) from the surge control valve (8058KM) (2).

 (2)
 Put blanking caps on the disconnected electrical connectors.

 (3)
 Remove the air tubes (3) and (4).

 (4)
 Remove the clamps (5) from the surge control duct (6).

 (5)
 Hold the surge control valve (8058KM) (2) and remove the V-clamp (7) from the bleed duct (8).

 (6)
 Remove the surge control valve (8058KM) (2).

 (7)
 Put blanking plugs on the disconnected line ends.

 Surge Control Valve
 Figure 401/TASK 49-51-52-991-002

 CES  TASK 49-51-52-400-002

 Installation of the Surge Control Valve (8058KM) (GTCP 36-300)
 WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 3.5 m (11 ft. 6 in.) No specific Torque Wrench : range 0.00 to 1.20 m.daN
 (0.00 to 9.00 lbf.ft)
 B. 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 31-32-00-860-001 Procedure to Get Access to the SYSTEM REPORT/TEST
 Menu Page 49-00-00-790-004 Air Leak Test with closed APU Doors 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) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 71-00-00-710-001 Dry Motoring Check 49-51-52-991-002 Fig. 401 49-51-52-991-004 Fig. 402

 3. Job Set-up
__________ Subtask 49-51-52-860-053
 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)
 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 49-51-52-865-053
 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 49-51-52-010-055
 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)
 Make sure that the light SW 11LJ is set to the ON position.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-51-52-991-002, 402/TASK 49-51-52-991-004) Subtask 49-51-52-420-051
 A. Installation of the Surge Control Valve (SCV) (8058KM)
 (1)
 Remove the blank plugs from SCV.

 (2)
 Put the SCV (2) into position and install the V-clamp (7).

 (3)
 TORQUE the V-clamp to between 0.68 and 0.71 m.daN (60.17 and 62.83 lbf.in).

 (4)
 Install the surge control duct (6) with the clamps (5).

 (5)
 TORQUE the clamps (5) to 0.79 m.daN (69.91 lbf.in).

 (6)
 Connect the air pipes (3) and (4) to the SCV (8058KM) (2).

 (7)
 Remove the blanking caps from the electrical connectors.

 (8)
 Make sure that the electrical connectors are clean and in the correct condition.
　
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