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 of tools and materials. 4) Make sure the area around the engine is free of tools and
 materials. 5) After you complete the maintenance, make sure you do these: 6) Remove all tools and engine parts that you do not use. 7) Attach all clamps and brackets. 8) Remove all loose (instrumentation and lockwire) wire. 9) Make sure the area of the air inlet cowl and engine bleeds
 is clear of all unwanted material. 10) Use a vacuum cleaner to clean the zones that are not easy to get to. 11) Make sure you install the covers.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 912-020-C00
 (3)  The Removal of Components and Accessories
 (a)  
The maintenance practices procedures for the seals and gaskets are included in Seals (Preformed Packings and O-rings) and Gaskets (AMM 70-30-01/201).

 (b)  
Do not let the metal tools touch the components and accessories before you remove them.

 (c)  
Prevent damage to the openings with clean covers/caps.

 (d)  
Prevent damage to the electrical connections when you
 disconnect the electrical systems.

 (e)  
Prevent damage to all ends of the equipment when you remove a component (for example, the gear shafts and connections).

 S 912-021-C00
 (4)  Installation of Components and Accessories
 (a)  
Write the type and serial number before you install a
 component.

 (b)  
Visually examine the general condition of the component.

 1)  Make sure the component is not damaged before you install it.

 (c)  
Make sure the mounting faces and seal grooves are clean and not worn.

 (d)  
Use only the tools made for the operation.

 (e)  
Make sure you see a minimum of one thread in the nuts and chamfers after you tighten the last torque.

 CAUTION: USE TWO WRENCHES TO REMOVE, INSTALL AND TIGHTEN THE HOSE
_______ AND TUBE COUPLING NUTS. MAKE SURE YOU USE ONE WRENCH TO HOLD THE NIPPLE AND THE OTHER WRENCH TO LOOSEN OR TIGHTEN THE COUPLING NUT. ONE WRENCH CAN CAUSE DAMAGE TO THE HARDWARE.
 (f)  
Make sure you tighten to the given torque values in the sequence of the procedure of operations.

 (g)  
Use gloves to hold the bearings and all other parts that can oxidate.

 (h)  
Do not use the cold-shrink procedure for the installation of bearings.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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 ALL  ú ú C01 Page 202 ú Jul 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
TEMPORARY MARKING PROCEDURES - MAINTENANCE PRACTICES
____________________________________________________
 TASK 70-10-03-912-003-C00
 1.  Temporary Marking Procedures____________________________
 A. General
 (1)  
Use temporary marks for temporary identification only.

 (2)  
Temporary marks are not intended to remain after engine operation.

 (3)  
Remove the temporary marks before the operation of the engine.

 (4)  
The temporary marks must not cause damage or failure of the parts, if you do not remove the marks.

 (5)  
When you make a mark incorrectly, they can be damaged by the high temperatures of engine operation.

 (6)  
Temporary marks used to identify parts may no longer be there after an engine run.

 (7)  
Incorrect materials used to make temporary marks, when subjected to high temperatures, can cause chemical damage to the part and cause possible part failure.

 (8)  
This procedure refers to the materials that were examined by CFM International. You can use these materials safely on engine parts.

 (9)  
　
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