(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, 49-91-44Page 408 201-210, Config-2 Aug 01/05
 CES  COOLER - OIL - REMOVAL/INSTALLATION

___________________________________
 TASK 49-91-44-000-003
 Removal of the Oil Cooler (8079KM) (APS 3200)
 WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
 WARNING : DO NOT LET OIL STAY ON YOUR SKIN FOR A LONG TIME AS IT CAN CAUSE
_______ INJURY.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking plugs No specific circuit breaker(s) safety clip(s) No specific container No specific protection cover No specific access platform 3.5 m (11 ft. 6 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits 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 49-91-44-991-003 Fig. 401

 3. Job Set-up
__________ Subtask 49-91-44-860-050
 A. Aircraft Maintenance Configuration
 (1)
 Energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-861-002).

 (2)
 On the panel 25VU, make sure that the APU MASTER SW pushbutton switch 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 49-91-44-865-063
 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 49-91-44-010-056
 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, 316AR (Ref. TASK 52-41-00-010-001).

 (3)
 Set the LIGHT control switch 11LJ to the on position.

 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-91-44-991-003) Subtask 49-91-44-020-052
 A. Removal of the Oil Cooler (P/N 4950882; M4950242)
 (1)
 Remove the V-band clamp (9) and disconnect the outlet duct (8) from the exhaust duct (10).

 (2)
 Put a container in position below the oil cooler (5).

 (3)
 Remove the drain plug (11) together with the packing (12) and drain the oil cooler (5) into the container.

 (4)
 Discard the drain plug packing (12).

 (5)
 Remove the nuts (1) and (13).

 (6)
 Withdraw the oil tube assemblies and retaining collars (2) and (14) from the inlet and outlet mount bosses.

 (7)
 Discard the packings (3) and (15).

 (8)
 Put blanking plugs on the disconnected line ends.

 (9)
 Remove the band clamp (7) and remove the cooler outlet duct (8).

 (10)
 Remove the band clamp (4).

 (11)
 Remove the four mount bolts (6).

 (12)
 Remove the oil cooler (5) from the cooling fan outlet duct (16).

 (13)
 Install a protection cover on the cooling fan outlet duct (16).

 Oil Cooler
 Figure 401/TASK 49-91-44-991-003

 CES  TASK 49-91-44-400-003

 Installation of the Oil Cooler (8079KM) (APS 3200)
 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
　
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