79-21-10
 ALL  ú ú N02 Page 703 ú Jun 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
(2)  
Access Panels
 415 Left Thrust Reverser Half - Engine 1
 416 Right Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 426 Right Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 436 Right Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4
 446 Right Thrust Reverser Half - Engine 4

 D.
Procedure

 S 027-002-N00
 (1)
Remove the probe for the magnetic chip detector (AMM 79-21-10/401).

 S 117-003-N00

 (2)
Put the probe in the solvent and move in a circular motion.

 (a)
Make the probe dry with a clean, dry cloth.

 S 217-004-N00
 (3)
Examine the probe for the remaining contamination.

 (a)
If it is necessary, clean the probe again.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-10
 ALL  ú ú N01 Page 704 ú Oct 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
NO. 3 BEARING BREATHER AND RESTRICTOR VALVE - REMOVAL/INSTALLATION
__________________________________________________________________
 1.  General
_______
 A.  This procedure has two tasks:
 (1)  
A removal of the breather restrictor valve for the No. 3 bearing compartment.

 (2)  
An installation of the breather restrictor valve for the No. 3 bearing compartment.

 B.  
There is one breather restrictor valve (referred to as the valve) attached to the front of the deoiler housing at the left front side of the main gearbox.

 TASK 79-21-11-024-023-N00
 2.  Removal of the No. 3 Bearing Compartment Breather Restrictor Valve
__________________________________________________________________
 A.  Equipment
 (1)  
Access Platform

 (2)  
Container - 5-gallon capacity, used for oil.

 B.  
References

 (1)  
AMM 71-11-04/201, Fan Cowl Panels

 (2)  
AMM 71-11-06/201, Core Cowl Panels

 (3)  
AMM 78-31-00/201, Thrust Reverser System

 C.  
Access

 (1)  
Location Zones
 413 Fan Cowl Panel, Left Engine
 415 Fan Reverser, Left Engine
 423 Fan Cowl Panel,Right Engine
 425 Fan Reverser, Right Engine

 (2)  
Access Panels
 413AL Fan Cowl Panel (Left)
 415AL Fan Reverser (Left)
 423AL Fan Cowl Panel (Left)
 425AL Fan Reverser (Left)

 D.  
Prepare to Remove the N0. 3 Bearing Breather Restrictor Valve.

 S 044-024-N00
 WARNING: DO THE DEACTIVATION PROCEDURE FOR THE THRUST REVERSER TO
_______ PREVENT THE OPERATION OF THE THRUST REVERSER. THE ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT.
 (1)  Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. PHASE 3 ENGINES POST-SB-75-95 ú

 79-21-11
 ú ú N01 Page 401 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 014-036-N00
 (2)  
Open the left fan cowl panel (AMM 71-11-04/201).

 S 014-037-N00
　
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