79-21-05
 ALL  ú ú N02 Page 417 ú Feb 18/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
S 414-025-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 WHEN YOU CLOSE THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (12)
 Close the left thrust reverser (AMM 78-31-00/201).

 S 414-020-N00

 (13)
 Close the left core cowl panel (AMM 71-11-06/201).

 S 414-021-N00

 (14)
 Close the left fan cowl panel (AMM 71-11-04/201).

 S 444-022-N00

 (15)
 Do the activation procedure for the thrust reverser (AMM 78-31-00/201).

 S 614-015-N00

 (16)
 Fill the engine oil (AMM 12-13-03/301).

 S 794-016-N00

 (17)
 Do this task:  "Test No. 3 - Ground Test - Idle Power" (AMM 71-00-00/501).

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 79-21-05
 ALL  ú ú N01 Page 418 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
MAIN OIL FILTER ELEMENT - INSPECTION/CHECK
__________________________________________
 1.  General
_______
 A.  This procedure examines the main oil filter element for contamination.
 B.  The main oil filter is installed in the housing of the main oil filter. The housing is installed on the forward face of the main gearbox at the 8 o'clock position.
 C.  You can get access to the main oil filter element through the left thrust reverser half.
 TASK 79-21-05-206-001-N00
 2.  Examine the Main Oil Filter Element (Fig. 601)
___________________________________
 A.  Consumable Materials
 (1)  
B00722 Solvent - Stoddard, P-D-680 Type II

 (2)  
G00000 Strainer - Paper

 B.  
Standard Tools and Equipment

 (1)  
Brush - Nylon

 (2)  
Container - 1 U.S. gallon (4 liter) capacity, used to catch the solvent

 C.  
References

 (1)  
72-00-00/601, Engine

 (2)  
79-21-05/401, Main Oil Filter Element

 (3)  
IPC 79-21-06 Fig. 1

 D.  
Access

 (1)  
Location Zone 412 Engine 1 - Main Gearbox Fwd Face 8 o'clock 422 Engine 2 - Main Gearbox Fwd Face 8 o'clock 432 Engine 3 - Main Gearbox Fwd Face 8 o'clock 442 Engine 4 - Main Gearbox Fwd Face 8 o'clock

 (2)  
Access Panel
 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

 E.  
Procedure

 (1)
Remove the element for the main oil filter (Ref 79-21-05/401).

 S 026-002-N00
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 79-21-05
 ALL  ú ú N01 Page 601 ú Feb 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
OIL TANK (REF) SEE B
SEE A
ELEMENT HOUSING MAIN OIL FILTER  (REF) MAIN GEARBOX (BOTTOM VIEW) A  FWD 
ELEMENT MAIN OIL FILTER 
COVER MAIN OIL FILTER 

B
Main Oil Filter Element Inspection
Figure 601

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 79-21-05
 ALL  ú ú N01 Page 602 ú Oct 10/88
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(2)  S 116-003-N00Clean the element with the clean solvent.
 NOTE:____ The metal particles and other contamination from the element will stay on the surface of the solvent used to clean the element. Make sure the container used to keep the solvent that goes through the element is clean and dry before it is used.
　
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