E.  
Procedure

 S 027-002-N00
 (1)  If it is not done, remove the last chance oil strainer (Ref 79-21-16/401).
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
INTERMEDIATE CASE (REF)
SEE C
SEE B
SEE A
MAIN AND ANGLE GEARBOX LAST CHANCE OIL STRAINER
FWD NO. 1, 1.5, AND 2 BEARING LAST CHANCE OIL STRAINER
A
NO. 4 BEARING LAST CHANCE OIL STRAINER
FUEL/OIL NO. 3 BEARING LAST
COOLER CHANCE OIL STRAINER TURBINE(REF) EXHAUST CASE (REF)
FWD FWD
B C
Last Chance Oil Strainer Cleaning Figure 701
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(2)  S 117-003-N00Use a nylon brush and solvent to clean the last chance oil strainer.
 NOTE:____ If the last chance oil strainer is cleaned to look for metal particles or other contamination, keep the solvent which goes through the last chance oil strainer in a container (Ref 79-21-16/601).
 (3)  S 117-004-N00Make the last chance oil strainer dry with the dry, filtered, compressed air.
 (4)  S 427-005-N00Install the last chance oil strainer (Ref 79-21-16/401).

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MAIN BEARING STRAINER HOUSING ASSEMBLY - REMOVAL/INSTALLATION
_____________________________________________________________
 1.  General
________
 A.  This procedure has two tasks. The first task removes the main bearing strainer housing assembly. The second task installs the main bearing strainer housing assembly.
 TASK 79-21-17-004-001-N00
 2.  Remove the Main Bearing Strainer Housing Assembly (Fig. 401)
_________________________________________________
 A.  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

 B.  
Access

 (1)  
Location Zone
 412 Engine 1 - HPC Case 9 o'clock
 422 Engine 2 - HPC Case 9 o'clock
 432 Engine 3 - HPC Case 9 o'clock
 442 Engine 4 - HPC Case 9 o'clock

 (2)  
Access Panels
 415 Left Thrust Reverser Half - Engine 1
 425 Left Thrust Reverser Half - Engine 2
 435 Left Thrust Reverser Half - Engine 3
 445 Left Thrust Reverser Half - Engine 4

 C.  
Prepare for Removal of the Main Bearing Strainer Housing Assembly

 S 014-002-N00
 (1)  Open the left fan cowl panel (AMM 71-11-04/201).
 S 044-003-N00
 WARNING: DO THE THRUST REVERSER DEACTIVATION PROCEDURE TO PREVENT THE
_______ OPERATION OF THE THRUST REVERSER. ACCIDENTAL OPERATION OF THE THRUST REVERSER CAN CAUSE INJURY TO YOU OR DAMAGE TO EQUIPMENT.
 (2)  
Do this procedure: Thrust Reverser Deactivation for Ground Maintenance (AMM 78-31-00/201).

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

 S 014-004-N00
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