(2)  
Access Panel
 416 Right Thrust Reverser Half - Engine 1
 426 Right Thrust Reverser Half - Engine 2
 436 Right Thrust Reverser Half - Engine 3
 446 Right Thrust Reverser Half - Engine 4

 C.  
Prepare to Remove the Buffer Air Cooler for the No.3 Bearing

 (1)
Open the right fan cowl panel (AMM 71-11-04/201).

 S 014-039-N00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////

CASE (REF) A-A
No. 3 Bearing Buffer Air Cooler Installation Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2 LOCATIONS) BOLT  SCREW (8 LOCATIONS) 
BOLT  SPACER PLATE CLASSIFIED 
MOUNT BRACKET 
OUTER ROD END BEARING 
AIR COOLER BUFFERJAMNUT STRUT JAMNUT (2 LOCATIONS) SUPPORT 
END BEARING INNER ROD  BOLT 
NUT 
Y  INTERMEDIATE CASE MOUNT BRACKET ON THE 
C 
X  B  (7 LOCATIONS) BOLT  SUPPORT 
B  (TOP VIEW) AIR COOLER BUFFER 
Y  C  B-B NUT (7 LOCATIONS) 
C  NUT (7 LOCATIONS) 
X D  Y  C-C SUPPORT (7 LOCATIONS) BOLT 
Figure 401 (Sheet 2) No. 3 Bearing Buffer Air Cooler Installation 

A80582
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 044-019-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground
 Maintenance (AMM 78-31-00/201).

 S 014-018-N00

 (3)  
Open the right core cowl panel (AMM 71-11-06/201).

 S 014-020-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00/201 WHEN YOU OPEN THE
_______ THRUST REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (4)  
Open the right thrust reverser (AMM 78-31-00/201).

 D.
Procedure

 S 024-043-N00
 (1)  Remove the buffer air cooler for the No. 3 bearing.
 WARNING: PERMIT SUFFICIENT TIME FOR THE BUFFER AIR COOLER AND THE
_______ RELATED TUBES OF THE NO. 3 BEARING TO BECOME COOL AFTER ENGINE SHUTDOWN. THESE COMPONENTS CAN BE VERY HOT WHICH CAN CAUSE INJURY TO PERSONS.
 (a)  
Disconnect the tube nuts from the buffer air cooler.

 (b)  
Remove the screws that hold the buffer air cooler to the intermediate case.

 (c)  
Remove the bolts that attach the buffer air cooler to the mount bracket.

 (d)  
Remove the buffer air cooler and the classified spacer plate from the engine.

 NOTE: Keep the classified spacer with the buffer air cooler.
____ If you will replace the buffer air cooler, use the classified spacer with the replacement buffer air cooler.
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