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 79-21-16
 ALL  ú ú N01 Page 403 ú Jun 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
D. Prepare to Remove the Last Chance Oil Strainer
 S 014-044-N00
 (1)  Open the left fan cowl panel (AMM 71-11-04/201).
 S 044-073-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 014-045-N00

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

 S 014-074-N00
 WARNING: OBEY THE INSTRUCTIONS IN AMM 78-31-00 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 left thrust reverser (AMM 78-31-00/201).

 E.
Remove the Last Chance Oil Strainer

 S 494-003-N00
 (1)  Put the container below the strainer to collect the remaining oil.
 S 024-004-N00
 WARNING: BEFORE YOU OPEN THE OIL TANK CAP, PERMIT A MINIMUM OF FIVE
_______ MINUTES AFTER THE ENGINE SHUTDOWN TO LET THE PRESSURE IN THE OIL TANK BLEED OFF. A FAST FLOW OF HOT OIL CAN OCCUR AND CAUSE INJURY TO YOU.
 DO NOT KEEP THE OIL ON YOUR SKIN FOR A LONG TIME. IF YOU DO NOT CLEAN THE OIL OFF, THE OIL CAN CAUSE INJURY.
 (2)  Remove the last chance oil strainer (2) with the steps that follow:
 CAUTION: YOU MUST USE THE WRENCHING FLATS ON THE HOUSING OF THE
_______ LAST CHANCE OIL STRAINER WHEN YOU LOOSEN THE LAST CHANCE OIL STRAINER. IF YOU DO NOT DO THIS, YOU CAN TWIST THE TUBE AND CAUSE DAMAGE TO THE TUBE.
 (a)  While you hold the housing of the last chance oil strainer (2) with a wrench, remove the last chance oil strainer (2) from the housing. 1) Catch the oil in a container.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 79-21-16
 ALL  ú ú N01 Page 404 ú Jun 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
S 034-005-N00
 (3)  Remove the packing (1).
 (a)  Discard the packing (1).
 S 034-006-N00
 (4)  Install the protection caps.
 TASK 79-21-16-034-077-N00
 3.  ENGINES WITH PW SB 79-52; Remove the No. 3 Bearing Oil Pressure Strainer (Fig. 402)
_________________________________________________________
 A.  Standard Tools and Equipment
 (1)  
Container - 1 U.S. gallon (4 liter) capacity.

 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 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 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

 D.  
Prepare to Remove the No. 3 Bearing Oil Strainer

 S 014-078-N00
 (1)  Open the left fan cowl panel (AMM 71-11-04/201).
 S 044-079-N00
 WARNING: DO THE 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 the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
　
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